A month ago I bought a mini usb rechargeable flashlight from Aliexpress. But, when I received and tested it, I noticed that it doesn't work properly. It has a small LiPo inside which doesn't hold the charge so it lasts for a few minutes until the light dies. I'm figuring out how to solve this problem and maybe uprade the LiPo to a NiMh battery that doesn't discharge over time.

I found this little Sony camera battery thrown away with some others alkaline dead batteries. On the little label glued to the battery, it was written that it contains Li-ion cells rated 680mAh. I was so curious to see the shape of the cells inside, test them and see if they were reusable for som... view more

• DIY
• battery
• salvage
• recycle

We all know that our smartphone's battery is always out of juice when we really needed it, for example to make an imp... view more

• DIY
• emergency
• powerbank
• charger
• portable
• EDC
• lipo
• circuit