Battery charging module for li-ion batteries.

Where to buy  20 for $6.26 (I paid $8.18 in November)
 You can buy 20 of the chips for $3.58 and then solder the connections yourself, I’m not sure it’s worth the time though.
Or 100pc for $17.80 0.18each
Important to Note
– Color: Blue
– Material: PCB + iron
– Chipset: TP4056
– Input voltage: 4.5V~5.5V
– Fully charged voltage: 4.2V
– Charging current: 1A adjustable
– Working temperature: -10’C~85’C
– Charging method: Linear charging 1%
– Charging precision: 1.5%
– Charging indicator: Red light charging, green light fully charged
– Interface: Mini USB
Useful Info & Review
 Modification on that board from DX
 Datasheet on TP4056