batteries

I have some solar garden lights. Some of these aren't currently working, so I pulled the batteries and tried charging them in my wall charger. They all got flagged as being faulty :/ So, since batteries are cheap enough, I'm going replace them. The original batteries are 150mAh. Searching...

Hi. Just wondered what everyones opinions are in regards to replacement batteries i.e OEM vs 3rd party, recomended brands etc. The original that came with my 70D is a bit tired (recharge performance shows red). I also have a 3rd party one which completely died today so I'm now looking for a...

Hi all, I am a mechanical engineer attempting electronics so please be nice :p I have a lithium ion battery pack (about 12V) for an electronics circuit and I have a separate circuit, independently powered by a 9v battery that has the sole purpose of protecting the main battery from over...