John AE5X
I've now gone through six charge/discharge cycles of my KX2's internal battery using the new KXUSBC2 to charge it and I've used different sources and USB-C cables for each charge.Regardless of the charging voltage used, the KX2 battery gets a complete charge, whether the charging source was 5V or...
adriangin
I picked up 4 of these off an auction site the other day. They are so much fun! The LTTO guns take 6xAA. This is designed for 9V. I started using rechargeable AA 1.2V NiMH cells, but my charger can only charge 4 at a time. As I had 4 taggers, that would be 4×6=24 AA batteries....
a42_bhql4y
All too many times I have heard that you can’t economically recycle batteries. That has been debunked. Redwood Materials recycles car, computer and pretty much anything else batteries extracting the […]
a42_bhql4y
MEGAPACKS are Tesla’s grid-level battery storage systems. Other companies also make similar systems. The question is why does adding battery storage to the electric grid make sense? A recent FutureAzA video […]
Willy Tarreau
Background After having successfully built a few tiny USB batteries in the past, I was always left with a bit of frustration about the difficulty to build them. My previous model has been working flawlessly for the last 2.5 years now despite the hackish way it was built, that's undeniably a...
Willy Tarreau
Context My digital camera (Canon A2100 IS) uses 2 AA cells as its power source, as can be seen on the photo below from the review site above : This was one of the reasons why I selected this model, because I didn't want to have to discover that the battery is depleted when I need it, and AA...