12V 10Ah 2 Pack

Although slightly shorter in height than original batteries, work like a charm. I have replaced the batteries in a 90's fold n go power scooter with these amazing little gems. Can and does still use its original charger, battery pack is now half the weight of what it used to be, and packs quite the punch. Installed very easily by swapping everything over to the new batteries, fully charged in very little time and scooter that had been sitting for years was back on the road.

Update 4 days later, 10/11/2024 Well...this did not work out. The battery arrived and was installed on Monday, just before Hurricane Milton struck Wednesday night. After a1/2 second test crank (which was fine), the battery was connected to a new LiFePo4 battery charger designed for this battery chemistry. The charger itself may be suspect, as the battery would not accept a charge. The charger displayed a fault mode after a few hours. I then connected it to a known good charger. After a charge of several hours at 2amps, the charger had to be disconnected as we prepped for the storm. A quick check on Tuesday (the next day) found that the generator would not start. Did not have time to do diagnostics with the storm coming. Had to pull-start the generator after we lost power Wednesday evening. Did diagnostics today, Friday 10/11. No problem with the starter motor, as it started immediately with my portable jumper pack. The Nermark battery showed less than 10V on my DVM. Both chargers displayed a battery fault, and were unable to charge the battery above 10.3V. It's possible there was an issue with the built-in BMS (Battery Management System), but I don't know. It's getting returned once Whole Foods is open again. Original Review 10/7/2024 Very simple installation to remove the old sealed lead acid 12-18 battery and replace it with this one. I have been using LiFePo4 batteries in my RC aircraft for over 20 years and I'm glad that this battery is available to replace the typical unreliable lead acid battery that is used as a starter in portable equipment. I took the opportunity to install the terminal rings and cable for the appropriate 3 amp charger and even without completing the charge, did a quick test start on my generator. I hope it will last several years, as this generator is only used for hurricane emergencies. However, I have batteries of this chemistry that are over 20 years old and still hold 80% or more of their charge. I will report back and update this review in the event that there are any failures, or possibly great news to continue to report years from now.

This small lithium battery has performed very well through six fishing outings supplying Power to my Humminbird Helix 5 fish finder. It holds the charge through 6 hours on the water. I highly recommend this light weight battery.

So ive been using these for about 3 years in some UPS units. Been working fine for the most part but it seems like the non-digital UPS units like the ones that sit on the floor will overload these batteries and cause damage to the BMS or something. I had 2 batteries die, one the voltage just dipped down to 2.3v and another the BMS got so hit it was melting the plastic on top and triggering a cut off. I brought up my issues to nermak on amazon and they shipped out 2 replacements immediately, got them a few days later. Very quick response and zero hassle, which is what all manufacturers/sellers should do. Using these in digitally controlled UPS units like 1000va+ (basically the towers) seem to have no issues over long periods, but APC doesnt recognize the chemistry difference at all and wont fully use the whole capacity of the battery. So im just gonna put all these into a batbox with a inverter and put the lead acids back in. Over all good battery, and good support. Im sure with everything working correctly these will last many years. I think i just got a couple duds lol.

después de meses usándolas, diversos cortes de energía al en estos meses, puedo decir que respaldan mucho mejor que las que traía mi UPS de ácido, sin duda compraré más este tipo de productos por su relación precio/calidad