12V 3000mAh Rechargeable Lithium Battery, Bare Leads Wire Replacement Battery Pack with Charger for 12V Devices RC Car, Boat, Robot, DIY, LED Light Strip, CCTV Camera guarden Pump

Nice little 12-V DC rechargeable battery. I used it to replace a device that used eight (8) AA cells. I simply removed the original battery holder and spliced this battery in its place. It easily fit where the old battery holder had been. I leave it plugged in. It has automatic overcharge protection. Where I live, there are often power failures. This new battery fills that gap.

Very nice. now see how long it lasts

My Rv dinning room light lost power and it is in the slide. I have no idea the path to track down the missing power. This was a great solution to get power to this dining room light

loses power too fast for what it costs. I had to buy 3 and piggy-back them for a useful sustained charge

Great 12V. Light and rechargeable, works great for my LED lights. And the charging plug is included.

When the power goes out, I have uninterruptible power supplies to keep my computer and in-home server running for at least long enough to shut down safely. However, as soon as the power goes out, my wired ethernet connection goes offline.Enter this Horsun 12v Li-ion battery pack, which effectively operates as a cheap 12v uninterruptible power supply for each of my ethernet routers - which all run on 12v dc, and draw 1 amp, well above the rated output of this device.All in all, It's a fantastic and cheap solution! Of course, it's in no way designed for this purpose, so I'll check on it a bit more frequently to make sure the batteries remain happy. Sorry for the under-desk wiring mess in the picture, but I think it helps explain how I'm using these batteries.Instead of using the charger that came with it, I'm using the 12v power supply for the router to keep the battery topped off - this means that while the run time for the battery might be a bit shorter, but the battery won't be getting over charged and the output won't exceed the voltage of the device itself.Besides, the charger is not UL, ROHS or FCC rated - it only has European/CE (Conformité Européene) safety rating, which isn't as difficult to earn as UL.

would I buy again- yesI bought this battery with intent of driving an older 9.6volt Makita drill I really like- Nicads are expensive and seemed to fade quickly. Wanted to upgrade to a better power supply and this seemed like a good idea. It actually fit in the old drills batter case.Product was advertised as a similar Capacity (1500 mah) and has a fairly robust battery protection feature (BMS) . It works. This is an important safety feature with Lithium-ion batteries in that it protects you and the battery form overheating and possible fires. When I first start the drill, it kicks in and drops the voltage. This is because starting a motor has the highest power demand on start-up and the protective circuit thought it was a short. If i did a slow start the drill came up to speed it ran ok--it was just the startup that produced the problem. I'm sure that for other applications it would be more than adequate. I really liked the fact that it came with a charger and a DC5521 connector as well as a buss block to connect it to your device. It also comes with fairly robust 16 ga wire for higher power applications. May be a substitute for drill battery if run in parallel but as a single power source the BMS will frustrate you

Contacts rust quickly when used in high humidity environment. Leads to total failure.