20 posts 1; 2; Next; Thermistor schematic Thermistor schematic . Also, many products available in the. The XTREME Charge XC100-P  Battery Charger & Desulfator is the best charger for a 12-volt battery. Lead Acid Battery Desulfator 4 of 5 11/26/2005 11:51 AM. Allow battery to remain for a minimum of 72 hours before retesting. A direct. A desulfator pulses a high voltage / current spike into the battery that causes vibrations that knock the sulfate crystals off the plates. +18622174908 [email protected] Desulfator Conditioners Quadlink (Charger Multipliers). 99. alton-moore. 4–1. 4 out of 5 stars 1,050 A battery desulfator kit is a device that is used to clean the sulfate deposits from the lead plates in a lead acid battery. 77Lead Acid Battery Desulfation > All > NEWBIES START HERE > Thermistor schematic . com FREE DELIVERY possible on eligible purchasesAuto Pulse 400AH Lead Acid Battery Desulfator Revive Battery Regenerator for Cars, Motorcycle, ATVs. WITH A 100% 90 DAY MONEY BACK. The graphic below (extracted from Interstate Batteries) shows lead-acid lifetime battery as a function of environment temperature (well, it is for car batteries, but the technology is very similar): Make it work. Charge battery to its maximum level. connected it makes a buzzing sound, I have seen up to 50 volts being. . And finally, a 5 second period to measure the battery voltage. $37. com FREE DELIVERY possible on eligible purchasesA low-voltage auto-shutoff work assists with thwarting energy waste. . 84 32% off. 【All in One】- It's the all-in-one solution battery charger, battery maintainer, trickle charger, and battery desulfator. The 3 basic components of lead-acid batteries are all 100% recyclable: Lead and lead products: 99% of lead is recovered during the smelting process and is recycled or sold as a commodity. Frequency is around 1. Connect the BatteryMINDer to the battery. DISCUSSIONS. PP-12-L Desulfator. Here is the 12 volt desulfator that I have built using the circuit schematic below. I put the scope across a . Enjoy precision charging. Determine the internal resistance of the battery by measuring the terminal voltage with open circuit, V, and then the voltage drop across an accurately known resistive load R, voltage DV. The Battery Life Saver electronic desulfator dissolves the lead sulfate crystals. Connect your desulfation charger to the battery and select the recon or repair mode. 2023/10/26 Battery Industry,Battery News. Designed for use with 6- or 12-volt lead-acid batteries, maintenance-free batteries, AGM, gel, and lithium-ion batteries. On switched ranges less than 30 amps, the average charging power is even less. its voltage per cell. It is the first type of rechargeable battery ever created. $ 30683. Car Battery Charger, TOPDON T4000 4A/1A Auto Smart Battery Maintainer Desulfator for Lead-Acid/Lithium ion Batteries. FREE Returns . While not shown at the $18 price, here is the charger's description: Harbor Freight 6/12 volt Battery Charger. Get Fast, Free Shipping with Amazon Prime. zsolt1 said: Most <50Ah batteries resonate around 1. Once the voltage reaches above 12 V, you can remove the charger and plug the desulfator to start desulfating operation. Disconnect the battery. 4. Opens in a new window or tab. $18. Q1 U1 U2** D1 C1 C2 C3 C4* C5** C6** R1 R2 R3* R4 R5** L1* L2 L3** Component. Battery Desulfator - SgtWookie's version of Alastair Couper design: Power Electronics: 11: Oct 18, 2018: Well-known 555 desulfator : correct duty cycle: Digital Design: 25: Jul 27, 2017: 12 Volt Lead Acid Battery Desulfator - New: Power Electronics: 7: Jan 1, 2016: R: Desulfator mod for single cell 2V: General Electronics Chat: 32: May 27, 2015: JHence I ask, what physical material difference is there in a truly new battery vs an old one, over time the back and forth electrolytic response does result in buildup of material, mainly from impurities in added water. Conduct a load test. The first step is to pulse the battery for 15 seconds using a Charged-Induced-Pulse described by desufonator2. 1; 5: 1; 5: 3; 7; Free shipping On all orders. Automatic Lead Acid Battery Desulfator 12V - 72V Battery Regenerator 400Ah Pulse Repair. 2V ,Lithium,LiFePO4,Lead-Acid AGM/Gel/SLA. The cells will absorb water slowly as you work. $188. Battery rejuventation or desulfation by means of pulsing was invented by Carl Edward Gali, (1928-2009), (retired microchip designer, Texas Instruments), US Patent 5,063,341, filed Oct 16, 1990, issued Nov 5, 1991. 82 continues. $69. I've seen straight DC chargers trickle at 1. Preserves new batteries. 8v (30%) in open circuit. 33 Was: $32. We highly recommend using an onbaord desulfator on your new lead acid battery as it will extend its effective life 2-3 times. A lead acid battery goes through three life phases: formatting, peak and decline (Figure 1). 3 Reviews Add Your Review . Battery Life Savers BLS-36N Desulfator for 36V Golf Carts. 022 µF Disk ceramic 0. with all the lead-acid battery types is sulfation [5. , the Battery Life Saver is designed to restore and rejuvenate old batteries sufferring from the harmful effects of sulfation. $29. 27,295. A lightly sufated battery can be "Desulfated" in a matter of hours using a 1-4 pound per day pulser. . It has an indefinite shelf-life and is unconditionally guaranteed to restore, improve and prolong the life of mechanically sound lead-acid batteries regardless of make, age, or size. Test, charge, and desulfate all types of 12V lead-acid batteries. 99. Mark. However a battery in such terrible condition might never recover to its 100 % capacity. If you will be working on full sized golf cart batteries then the direct drive is the way to go. BatteryMINDer OBD-24 On Board Desulfator 24 Volt. Frequency is around 1. It's 35% smaller and delivers 35% more power. $2599. 992. A lead acid battery is made of parallel plates. If your looking for some guidance on finding the right battery desulfator for your needs please don't hesitate to either give us a call toll-free at 1-877-775. 0A, connect across battery. FREE Returns . Most battery desulfators on the market today are simple devices that attach to the battery terminals and send a pulse of current through the battery. The idea behind the desulfator is that it breaks apart the lead sulfate, allowing the lead to be re-deposited on the plates. 99 $ 17. 1 . $17. The lead reacts with the sulfuric acid inside the electrolyte to form lead sulfate. 50 KHz How to Use 1. Eliot. 01 DF and I am starting to think that this is too high. I purchased a second one the other day as I desparately needed another inexpensive charger and funds are limited. 35 to 40 volts means an open cell or rain water for electrolyte. 3 out of 5 stars 157 $219. 2 . This is an exce. Each lead acid battery has a total frequency of around 2 to 6 megahertz. We provide premium chargers and. Pulsetech 735X453. This crystal growth. Sulfation accounts for roughly 80% of all battery failures. 5. i see i cant add my pcb here or can someone tell. It is a method where the device generates pulses with high-frequency and use them to zap the sulfate buildups on the battery plates. Brand: utipower. Overnight. 95. 5 AMP Fully-Automatic Car Battery Charger Automotive, 6V and 12V Battery Charger Maintainer, Trickle Charger, Supersafe Smart 12 Volt Float Charger, Battery Desulfator for Lead-Acid BatteryThe battery terminal voltage is allowed to rise to between 2. 9 out of 5 stars 215 ratings. 99. This is an exce. A lead-acid battery should only get warm at really high charge rates though. A Summary: Battery Reconditioning. 2w FREQUENCY RANGE 1. The XTREME Charge XC100-P  Battery Charger & Desulfator is the best charger for a 12-volt battery. Key benefits of using battery desulfurizers include extending the life of lead-acid batteries, improving their performance and capacity, and potentially saving money on replacement batteries. A direct correlation. In case your battery starts developing permanent sulfation, one should not panic because the process is reversible through desulfation. Side note: I had one desulfator going with a 55V/49A MOSFET and the only thing that would get hot (140-150F) was the diode. 0033 Ohm. Share with: Link: Copy link. This sulfation will gradually build and limit the battery's ability to charge, store, and release energy. It is damaging to other types of lead-acid batteries and will reduce the battery life due to the outgassing of hydrogen, which can't be replaced (i. $18. Availability: BatteryMINDer® 12106 is a 2 stage Charger-Maintainer-Desufator that extends performance and life of 6 Volt lead acid batteries including flooded (filler cap, maintenance-free, valve regulated lead-acid [VRLA], sealed lead-acid [SLA]), starter, deep cycle and hybrid. Its pulse width changes with the charging pulse width. Different aging mechanisms dominated the capacity loss in different cells within a dead 12 V VRLA battery. Opens in a new window or tab. It would not be surprising if people use the same lead acid batteries for up to 45 years. Take your time. The Mroinge 5-Amp Fully-Automatic Battery Desulfator is a 6-volt and 12-volt battery charger, battery maintainer, trickle charger, and battery desulfator. 95. Description: BACKGROUND OF THE INVENTION. PulseTech 390PT Digital Battery Conductance Analyzer 741X390. (The battery I am working with is a DURA POWER 60 with 260 Load Test Amps when it was new, it sat for 9 months and when I tested the voltage it was at 2. $49. Battery damage does not occur during this process. 00. One time in an experiment gone badly I desulfated a pair of L-16s in about 10 secs. 99 $ 29. 5v but in all other ways tests very good especially the load test. 1; 5: 1; 5: 3; 7; Free returns. $25. does deep cycle battery need anything more? i thought 13. Put your safety glasses on. 48 Volt PowerPulse PP-48-L Lead-Acid Battery Desulfator. Measure across D4 with the positive lead on the cathode. Meet the GENIUS1 - Similar to our G750, just better. 31. During discharge, both plates convert to lead sulfate (PbSOWhen this vibrational state is occurring, there are uncountable Lead-Acid Battery Desulfator Parts List collisions between the ions in the electrolyte and the battery plates, Item Component Description Cost (US$) as the back and forth vibration Q1 IRF9Z34 P channel MOSFET 1. Availability: BatteryMINDer® 12106 is a 2 stage Charger-Maintainer-Desufator that extends performance and life of 6 Volt lead acid batteries including flooded (filler cap, maintenance-free, valve regulated lead-acid [VRLA], sealed lead-acid [SLA]), starter, deep cycle and hybrid. Drill three holes for ventilation on the right side and then a hole on the lid of the can. Lead Acid Battery Desulfation > All > Pulse Charging and Desulfation > Simple Direct Drive Desulfator PCB thread . 5V. Opens in a new window or tab. 54A lead-acid (SLI) battery desulfator which is powered by the batteries wh it is conditioning when a motor associated with the batteries is off. To increase internal-resistance measurement accuracy. This is the same structure as a capacitor so view a battery as 6 equal sized capacitors in series. These crystals cause batteries to become unusable at approximately one-third of their natural life. $129. 9 is a standart one given in many chargers. One rather intrusive method is to replace the sulfuric acid electrolyte with a greatly. utipower Auto Pulse 400AH Lead Acid Battery Desulfator Revive Battery Regenerator for Cars, Motorcycle, ATVs . So in this video we'lll see if it made any difference. The other option is to use a battery desulfator, which will do the work for you in just 30 minutes. Only 5 left in stock. Sulfation is the most common cause of battery death but a. The Xtreme Charge Desulfator Battery Charger is a minimal gadget that assesses, tests and charges 12 volt lead corrosive batteries that’s why we included it in the list of the best battery desulfator. It was designed to use capacitors as the energy storage devices. XTREME CHARGE XC100-P Desulfator &. There are a few different ways to desulfate a lead acid battery. design. The batteries treated with Thermoil lasted on average 13 and one half years. 64. Most regular car batteries are lead acid, including flooded lead acid (the older kind with liquid acid solution), sealed gel cel, and sealed AGM (absorbed glass mat). Now, add Epsom salt to the hot water and stir it until it has dissolved into a solution. #1. 2 watchers. The lead–acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Plant. This sulfation will gradually build and limit the battery's ability to charge, store,. Sponsored. According to TABLE 8 in the US Battery User Manual, the batteries are fully charged at 12. 2KHz and 6% duty cycle. The major cause of deterioration in lead-acid batteries is sulfation. C. Hello, I have built classic desulfator 12v circuit with external power source and have very old 12v car acid battery with easy each cell access (see picture) for testing and recovery. So, it’s always important to keep a lead-acid battery in constant use. Measure across D2 with the positive lead on the Anode. $265. Learn more at: Sulfation accounts for roughly 80%. ac. This powerful desulfator is designed to work with batteries and packs ranging from 12 to 72 volts, with a capacity of up to 600Ah. Fully automatic operation and very simple to set up. This BLS-48B is designed for 48 volt battery systems will ship for FREE!. It also works on two or three small 48. Determine the internal resistance of the battery by measuring the terminal voltage with open circuit, V, and then the voltage drop across an accurately known resistive load R, voltage DV. Return this item for free. Of those 16 batteries I kept 4 batteries as spare and top them up at regular intervals to keep them charged and compensate for the leakage current. Re: Lead Acid Battery Desulfators 01/04/2015 10:08 PM I've also played around with trying to desulfate batteries and I would say that maybe 1 in 10 can be reasonably rejuvenated. Designed for High-Performance Specialty AGM Sealed Batteries (such as those made by Optima, Odyseey, Polaris & Yuasa. Works. The build up then drops into the battery acid and dissolves. $12. A desulfator charger determines your battery’s health and sulfation level, then attempts to restore the battery’s lost capacity. Pulsetech 735X453. Madness. This item Beleeb Multi Voltage Battery Charger 12V 24V 36V 48V 60V 72V for Lead-Acid and Lithium-ion Battery,Trickle and Desulfator, 19lb, Black Beleeb Adjustable Battery Charger 12V 24V 36V 48V 60V 72V Smart LCD Display Pulse Repair Desulfator Cable Clamps Automotive Maintainer for Golf Cart Mower Boats, PWCs. Sulfation was the predominant aging mechanism in the weakest cell but water loss reduced the capacity of several other cells. Allow battery to remain for a minimum of 72 hours before retesting. i adjusted R2 to 44k as im trying to rep a 6v battery agm type i think. . 0 out of 5 stars 80. And here is the configuration: 1- A 1000VA transformer, 24V out. $162. 99 In Stock. 15*2. 30,129. Set the dimmer about halfway and it will nicely generate the fast spikes that are needed to desulfate a battery. The final step to make your own desulfator of battery lead is welding wire of lead in place. 05ohm resistor in the neg lead and I get a current waveform similar to what you posted but the question is how do you figure out how much of that current to attribute to the actual desulphation process since. Firstly, after arranging the suitable charger or the compatible sulfator, you need to connect it with the AGM battery. Free shipping. YONHAN Battery Charger 10-Amp 12V and 24V Fully-Automatic Smart Car Battery Charger, Battery Maintainer Trickle Charger, and Battery Desulfator with Temperature Compensation. ☕🍩 If this video helped you & you would like to make a modest donation to the channel, why not buy me some coffe. - The 40volts DC from above is feed to a capacitor bank through a. HULKMAN Sigma 10 Amp Fast Car Battery Charger and Maintainer for 6V and 12V Battery with LED Screen Trickle Charger and Desulfator for Lead-Acid and Lithium-ion Battery for Car Truck and More $129. Battery Charger,Battery Maintainer, Trickle Charger, and Battery Desulfator for Car,Boat,Motorcycle, Lawn Mower. 3. 75-Amp Car Battery Charger, 6V and 12V Smart Fully Automatic Battery Charger Maintainer, Trickle Charger, Battery Desulfator for Car, Lawn Mower, Motorcycle, Boat, Marine Lead Acid Batteries 4. BatteryMINDer 128CEC1-AA-S5: 12 Volt-8 Amp Concorde Aviation Battery Charger, Battery Maintainer, and Battery Desulfator; 10 3. Some web articles and youtube videos suggest reviving a lead-acid battery by adding a solution of Epsom salt in distilled water. 6 volt lead-acid battery will have an internal resistance of about 0. The origional kickback desulfator ran at . Push-button Selection for ALL battery types and charge rates. 44. Electrolyte: 100% of sulphuric acid sold is recovered and is recycled, sold as. 6V/29. I preyed open the cove sense it was sealed and. Charging a lead acid battery through PWM method is said to initiate desulfation, helping recover battery efficiency to some levels. I'm seeking ideas for making a pulsing lead-acid desulfation circuit design. Determine the internalThe Battery Extra restores and recovers battery performance in lead acid batteries. FORUMS. The SP2 with the smallest collector carries a list price of $99. I found four 12 volt, lead acid batteries with four different problems. DISCUSSIONS. Subscribe to our newsletter. « Reply #1 on: February 15, 2015, 05:22:37 pm ». battery desulfator 12v. When a battery is discharged some of the lead (Pb) in the lead plate and some of the sulfate (SO4) in the sulphuric acid join together to form lead sulfate (PbSO4). Brief Description. Most batteries are murdered. 5A) and L2(Idc 2. An object that has a natural frequency of vibration of 1. 100% Full - Time U. During this process, current passes through the sulfate buildup. 4-2. BatteryMINDer® Model 2012-AGM: 12-Volt 2 AMP Charger-Maintainer-Desulfator for Optima, Odyssey, Polaris, Yuasa & other High Performance Specialty 12 Volt Sealed AGM Lead-Acid Batteries. 5 offers from $20. A place where builders and u. 30 $ 148. Automatic Motorcycle Battery Charger for Truck Lawn Mower RV Boat Lead-Acid Battery. The trickle current should only be 1/500 to 1/1000 of the amp hour rating of the battery. For a standard lead-acid battery, it will typically take between 24 and 48 hours for the desulfator to start working. STEP2 Remove its case if its an SLA (Seale Lead Acid )battery and open the vent caps. Try again!It is no secret that sulfation is the #1 killer of lead acid based batteries and that desulfators using Pulse Technology make an IMPACT. Brand New. 3. This process can help to restore the battery to its full capacity. TecMate TM-341DUAL OptiMate 4DUAL 1 Amp. If electricity pulses of low power, but high frequency and high voltage are sent into the battery, rhythmic resonance of the plates causes the crystal deposits to split and the sulfate comes back to the electrolyte solution. 99. Addicted Member. FREE delivery Wed, Nov 22 on $35 of items shipped by Amazon. 01 ohms. My Dynasty UPS12-310 high output battery is spec'd at 0. Introducing the Battery Rejuvenator 12-72 600, the ultimate solution for maintaining and reviving lead-acid batteries. Put some water in one cell and move to the next. $18. I have put diodes across the battery that has dampened it so I am fairly sure that the it is coming from the. According to Pulse Tech, the idea was initially stumbled upon by accident when inventor Wilford Burkett found that for some reason. A kick back desulfator can only put out 5 to 10 amps and then it's done. Open up all battery caps. 50 v. 9 out of 5 stars 215. Desulfators work for me. Feb 24, 2012. Steps to follow:-. NOTIFICATIONS. 12V Lead Acid Battery Desulfator SLA AGM Battery Life Extender with Shell Product Parameters: INPUT VOLTAGE: 12Vdc OUTPUT VOLTAGE :30V (pk-pk) RATED CURRENT:40mA Average FREQUENCY RANGE :1. #12. 8 out of 5 stars 111YONHAN Car Battery Charger 12V 6A Smart Battery Trickle Charger Automotive with LED Color Display, 12V Battery Maintainer Desulfator for Car, Truck, Motorcycle, Lawn Mower & Marine Lead Acid Batterie. New Advanced Technology: dissolving sulfates WITHOUT DAMAGING THE BATTERY PLATES. )Buy Beleeb Adjustable Battery Charger 12V 24V 36V 48V 60V 72V Smart LCD Display Pulse Repair Desulfator Cable Clamps Automotive Maintainer for Golf Cart Mower Boats,. You should also ensure: It is not deprived of full charges. 50 and 2. Main applications: Recovery and maintenance of lead acid batteries generally found in Solar Battery Banks, Standby Batteries and Electric Vehicles. $29. These controllers can manage the charging and discharging of lead-acid batteries. To reduce heatsinks and costly thyristors, an single-pole-four-way switch could be applied to select. In the formatting phase, the plates are in a sponge-like condition surrounded by liquid electrolyte. A duty factor of . Today, the considered conventional way of desulfating a lead-acid battery is the method that uses a device called battery reconditioner or desulfator. 5% coupon applied at checkout Save 5% Details. Free shipping. 047uf 400v, . FREE delivery Wed, Nov 22 on $35 of items shipped by Amazon. I probably do not have the right coils (got these from my junk box) , it still works , when its. The sulfation of lead-acid battery can be avoided completely with the help of a charging controller. Jumper CablesChargerMeterthe two electrodes of a battery are not equal, the dynamic characteristics of both electrodes are also different. New 2A Lead Acid Battery Desulfator Rejuverate Batteries Auto Pulse Regenerator. FORUMS. This primes the battery to charge deeper, perform better, and last 3x. This video prov. 5Ah battery was terminated manually at 7. Let’s explore some of these effective techniques: 1. 84 32% off. 0022 µF, not 0. Lead Acid Battery Desulfator 12V 24V 36V 48V Battery Regenerator 2A Auto Pulse Desulfator. It is not a proven theory and. In the end now it seems to take about 48hrs give or take to desulfate the average sulfated battery that others have thrown away. 99. $148. You will need a healthy 12 volt battery of a similar capacity as the dead battery, and a Battery Extra EX01 12-150 or EX01 12-24-200 battery desulfator. 82. Note: Do not expect to completely dissolve sulfate in a day. Note: Do not expect to completely dissolve sulfate in a day. Share. Acetic acid attacks the positive lead. Nov 17, 2011 #1. 99 £ 37 . 40This item: THBM 3. The Pulse Tech 12v On-Board Desulfator Power Pulse is designed to ensure maximum battery performance on single 12-volt lead-acid batteries. PP-48-L. Lead Acid Battery Desulfator 12V 24V 36V 48V Battery Regenerator 2A Auto Pulse. 99. The lead–acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté. 15V one day after removing it from the charger. 99. AUIRF1404Z is rotated to match the pins. The second step is a settling period of 1 second. Battery Desulfator Circuit. 13 32% off. 50 KHz How to Use 1. BatteryMINDer 128CEC2: 12 Volt-2/4/8 AMP Lead Acid Battery Charger, Lithium (LiFePO4) Battery Maintainer, and Battery Desulfator. Third is a 100 microsecond pulse that shorts the battery (180 amps?) to remove dendrites. It desulfates lead acid batteries as well. So the higher the pulse for a given avg amperage drawn the better the battery's condition. All of the items below are lead acid battery desulfator units designed to work with both flooded and AGM batteries - please note that these units are NOT for use on lithium batteries. Both electrodes were almost black when I first charged the battery. One electrode in a battery turns into pure lead with a ligh grey surface. It would make a loud wine, and hooking it up to the battery would make a good spark. Mark. or Best Offer. at >) about 'Desulfator: Pulsed charger- Lead acid Batterie in Photovoltaik. Add to Wish List Add to Compare. While this does work, the inductor can only hold so much energy each pulse. In case your battery starts developing permanent sulfation, one should not panic because the process is reversible through desulfation. LST 12V Battery Trickle Charger And Maintainer. 8. For discussion lets assume a pulse rate of 1000 Hz and a pulse width of 50 microsecs. 43V initially, now when I connect the desulfator up to the battery, that reading can be acquired in a relatively short order (ie a few hours if the battery has been recently desulfated). 75-Amp Car Battery Charger, 6V and 12V Smart Fully Automatic Battery Charger Maintainer, Trickle Charger, Battery Desulfator for Car, Lawn Mower, Motorcycle, Boat, Marine Lead Acid Batteries 4. These devices use high-frequency pulses to break down the sulfate crystals on the battery plates. FOXSUR Universal charger, It is a car charger with 6 charging modes, with display, 2-in-1 lithium battery and lead-acid battery. Or fastest delivery Tue, Nov 21 . It is a suitable electronic circuit that is attached in parallel to the two electrodes of each battery to continuously generate a high-frequency pulse with different duty cycle lengths. I tested the voltage doubler at 6. Share. It occurs when the battery is not fully charged, and lead sulfate crystals build up on the battery plates. Battery model is a simplified one that I frequently use for desulfator circuits but it is adapted at 13V/0. 4. The NOCO GENIUS1, 1A Automatic smart charger is a reliable and easy-to-use car battery charger that is perfect for maintaining your car battery. PP-12-L Desulfator. 97 $ 59. It looks like a pretty simple device that sends pulses to lead acid batteries to help clean the battery plates. 022 µF. Use plastic funnels to pour Epsom salt into each battery cell until the cells are filled with salt. Permanent sulfation sets in when the battery has been in a low state-of-charge. 12V Lithium, and 12V Repair Mode - for all types of lead-acid and lithium-ion batteries. we charge upto 2. Many a lead acid battery have fallen victim to pre-mature death by sulfation, but this process can be slowed, reversed and mostly prevented simply by utilizing the proper tools. 56. My roomba battery, which I purchased used, could only hold a charge for a few minutes.