Keeppower2 Pcs Flat Top 18350 10A Discharge IMR 1200mAh 3.7V UH1835P Quality High Drain Li-ion Rechargeable Lithium Battery

This is what Prometheus Lights sells to power their ultra high end lights. I’ve had several of these and I’m not disappointed

These batteries are exactly what they say they are! High drain 18350 batteries. I bought them for use in my LEP flashlights such as Lumintop Thor! The best part of these batteries are that they are flat top batteries but they include magnetic button top attachments that easily transform them to button top in an instant!

I Purchased this February 2022, and I am writing this review 24 months later. At this point in time both batteries have stopped working. Both of them were placed into a rotation cycle along with two other 18350 batteries. The other two, both from modlite, are still currently working. Keeppower battery #1 died about six months ago, and keeppower battery #2 died about one month ago. Both of them appear to have sustained damage to the positive end of the battery. Possibly from recoil during use in my PL350 light. None of my other 18350 or 18650 batteries have displayed this weird pattern. While they were in use, I noticed no issues with performance or the batteries developing a “memory.” I did not notice any diminishing output or reduced performance prior to them ceasing to work. The two smart battery chargers that I have will not even recognize the battery when placed on the charger.

I got these as an upgrade to the batteries that came in my laser (16340's rated at 700mAh). They came with small neodymium magnets to use if you need "button top" batteries, which I did, so thankfully they were included. Charged right up in my EBL charger. My laser works great! 5 stars.

Have a Thru Night Catapult Mini, but it stopped working. After reading reviews seems the battery was the likely suspect so I took a chance and went with Keeppower replacement. Luckily it was the Thru Night battery and this one works great.

Both batteries tested a little over 1200 mah and 4-21V. Would highly recommend these. Using these flat tops in a Radiomaster Zorro with absolutely no fitment issues at all.

**UPDATE 11/15/2022**Voltage still deteriorates at different rates between my KeepPower batteries during use. Caparatively, when using my stock Carta batteries in ly Carta V until 2 of 4 Battery LEDs show then I take out them out and both are at 3.67 to 3.69 volts for recharge. They're extremely like that when inserted into my charger that shows the voltages.These KeepPower batteries will still be upwards of 0.20 volts mismatched. 3.53 and 3.76 volts for example is not Keeping Power the same. Something isn't right to me but at least they're still working. I just like the voltage to synchronize when I marry 2 batteries into permanent pairs like they always have with other Bigger, more expensive brand name high discharge batteries.I'll live with it and I'll leave the 3 stars for average because it is good I can still use them. Not as much as years ago since the US Government 'Elected' representatives are representing tech Companies that fill their pockets by over regulating the fuel companies our economy still needs to run. Now I have to make all sorts of cut backs on everything from the harsh, stressful economic fallout of the Elected's deeper debt spending, sadly including activities that use these batteries.So I could never afford replacement batteries right now or for a very long time so these have to keep lasting like they have been. I'm sorry I'm stressed but felt I should update a year later since I said I would. Thank you for your time with my thoughts. Take care.****UPDATE 6/8/2021**** Reached out to manuf. about deteriorating voltage loss of 1 of pair. Manuf. is sending replacement set, so I am giving 3 stars because of service department response and actions alone. Will follow up about replacement set performance.****ORIGINAL STATEMENT****Upon receiving these batteries everything seemed fine. I have a Nitecore 4bay charger that tells me the voltage remaining etc. These batteries were voltage matched upon first use. However within a coue weeks one battery drains significantly faster than the other. I like to charge 3.7v batteries when they get down to 3.7v. Over time 1 battery is gradually having a lower and lower remaining charge compared to the other. Now when I place them on the charger when it's time to charge, 1 battery will be at 3.55v while the other is at 3.78v. My other 3.7v batteries drain equally in the same device. So either the 1 defective or never was truly a 1200mah battery and is actually a 900mah or worse with a different wrap. Not happy. My stock batteries that came with my Carta V still deplete equally albeit a little faster due to aging. Hope this helps others.

No problems with charging or using - can recommend for a reliable 18350 battery.