3.7V 4400mAh 1S2P Li-ion Replacement Battery – JST-PH 2.0 2-Pin Connector, 16.28Wh

With a little extra work they fit using the original battery connection

Easy to change out in my light and works great

I LIKE THE BATTERY BUT IT DONT WORK INTO MY ALARM SYSTEM AND I CANNOT USE IT THANKS

I recently embarked on a maker project to set up a Meshtastic communication network, and the Xain-USA 18650 3.7V 4400mAh rechargeable Li-ion battery pack was the heart of my power solution. This battery pack has proven to be an excellent choice, providing reliable and long-lasting power to my DIY setup.The capacity of the battery at 4400mAh is impressive, ensuring that my Meshtastic devices stay operational for extended periods without the need for frequent recharging. The 16.28Wh energy rating is a testament to the endurance of this battery pack, which is crucial for outdoor and remote applications where power sources are scarce.One of the standout features of this battery pack is the JST-PH2.0mm 2-pin interface female connector. It offers a secure and straightforward connection to my devices, making the integration process hassle-free. The compatibility with a wide range of applications, from outdoor lights to GPS and speakers, speaks volumes about its versatility.The build quality of the battery pack is noteworthy. It feels robust and well-constructed, which gives me confidence in its safety and longevity. The rechargeable nature of the Li-ion cells is not only cost-effective but also environmentally friendly, reducing the need for disposable batteries.In my experience, the Xain-USA battery pack has performed admirably, with no issues regarding power output or consistency. It has been a reliable component in my Meshtastic project, and I can see it being equally effective in powering other electronics such as outdoor lights, toys, or even as a backup for fire alarms.In conclusion, the Xain-USA 18650 3.7V 4400mAh rechargeable Li-ion battery pack is a fantastic option for anyone involved in maker projects or in need of a dependable power source for their gadgets. Its high capacity, durable construction, and ease of use make it a valuable addition to any DIY toolkit. I'm thoroughly satisfied with its performance and would not hesitate to recommend it to fellow enthusiasts. A solid 5 out of 5 stars for this powerhouse battery pack.

I have a CTronics camera that originally came with a 4-cell battery pack, but I've been unable to find a replacement. This battery pack is the same voltage and even though its milliamp-hours rating is lower, so far it's doing a great job. Charges properly, and keeps the camera running all night.