Tiny Battery Charger
Tiny Battery Charger quarter size comparison
Tiny Battery Charger
Tiny Battery Charger back view
Tiny Battery Charger

Tiny Battery Charger


132 in stock
Regular price $ 6.95 Save $ -6.95


This is a standalone Lithium battery charger which lets you charge up your batteries from a micro USB cable.  The battery can connect to a JST SH connector  (the battery connector on the batteries that we sell at TinyCircuits). You can also use this without the JST connector with two large through holes to connect to a battery pack.  

Simply plug the USB side with a cable into a USB port, and plug a lithium polymer or lithium ion rechargeable (3.7V / 4.2V) battery into the other side and it will start charging.  A status LED on the board will indicate when charging, and will turn off when fully charged.  

Note: The battery and the microUSB cable are not included.   

    • 2-Pin JST SH Connector for battery connection
    • Includes two solder tabs to connect directly to battery terminals if desired
    • 100 mA charge current (can be set to 500mA with a resistor change)
    • Status LED indicates when charging
    • Robust Gold Finish – makes soldering easy and is non-corrosive


      • PCB Dimensions: 14mm x 9mm (0.511 inches x 0.354 inches)
      • Max Height: 3.7mm (0.146 inches)
      • Thin 0.61mm (0.024 inches) PCB
      • Weight: 0.540 grams (0.019 ounces) 
      • The charge current can be changed to 500mA by moving R5 (next to the 0.1mA label on the silkscreen) to the R4 (next to the 0.5mA label on the silkscreen) position.   

      Customer Reviews

      Based on 8 reviews
      Sean Brua
      Some of the best parts for small projects

      I use the battery's for my 3d printed projects... Long lasting easy to use & setup!

      Michael Dennett
      Works great

      The only problem with this charger is the possibility of losing it on my messy workbench, due to the tiny size! It works perfectly so far, bringing my lightly discharged 40mAh cells back up to charge in 15-20 minutes. Those 40mAh cells are amazingly small too.

      David J Hiltebrand
      small but effective charger

      Had previously purchased 6 kits for grandchildren. Charger does a great job. greatest challenge is storage.