76-Cent USB Charger Board

erco

When you buy ten for $7.61:

http://www.ebay.com/itm/10pcs-TP4056-1A-Li-ion-Battery-Charging-Board-Lithium-Charger-Module-Micro-USB-/331346025877

These are sold as charging both LiPo (1S) and Li-Ion cells, uses the TP4056 chip:

http://lygte-info.dk/review/Review%20Charger%20TP4056%20UK.html

erco

If I hook that USB charger & battery up to a 5v booster module and run the output back to the charger input, will I get perpetual motion, endless power, or a black hole?

http://www.ebay.com/itm/0-9V-5V-to-5V-DC-DC-Booster-Module-USB-Mobile-Step-up-Power-Supply-Module-TE-/121285596454?pt=LH_DefaultDomain_2&hash=item1c3d2f5526

localroger

erco wrote: »

If I hook that USB charger & battery up to a 5v booster module and run the output back to the charger input, will I get perpetual motion, endless power, or a black hole?

Smoke, I presume.

mindrobots

localroger wrote: »

Smoke, I presume.

..followed by pointed observations about your choice of hobbies by your wife.

User Name

This is just the upgrade my kids' toy helicopters needed. The original charging method was not particularly protective of the LiPo cells, always continuing well past 4.2 V.

Also very nice that a resistor can be changed to deliver any charging current from 100mA to 1A. This will also aid LiPo longevity.

erco

Here's a USB cable with integrated charger for $2.74, a Hubsan replacement charger:

http://forums.parallax.com/showthread.php/157800-USB-Power-Board-Source?p=1298518#post1298518