Tagged Questions

3
votes
1answer
719 views

3.3V Power Failover Supply with USB Li-Ion Charger

I am currently designing a "3.3V@500mA Power Failover Supply with Integrated USB Li-Ion Charger" for a uC project. I want the circuit to draw power straight from USB power when available & switch ...
0
votes
1answer
242 views

Using old notebook battery to power electric screwdriver

I have: Dead notebook with live LiIon battery (HP HSTNN-CB50): 14.8V, 8 x 2500 mAh 18650 LiIon cells. Rated at 73 Watt-hour. I haven't managed to open the battery pack yet, but it's clear from the ...
0
votes
6answers
2k views

How to charge Laptop Li-ion Battery cells manualy?

I have received some Li-ion batteries which were originally used in Asus A2 Laptop battery original one and I would like to know if it is possible to charge each cells independently with some device ...
6
votes
3answers
2k views

How do I charge a commercial lithium battery with solar cells?

I have a digital camera (Panasonic DMC-FT1) and will be going multi-day hiking with it soon. I'm looking to build a solar charger for it using something like this and strap it to my pack. Does anyone ...