|TP4056 1A Li-ion/LiPo charger with micro USB socket|
A 26 x 20mm pre-built module which will charge a single Li-ion or LiPo cell from a 4.5-5.5V source (eg, USB).
Charges at up to 1A. Charge current can be changed by switching out one of the SMD resistors. Thermal regulation protects the device before it overheats, reducing charging current if necessary.
For more details, see the article in the August 2017 issue titled "El Cheapo Modules: Li-ion & LiPo Chargers" (starting on page 44).