Art and Technology are Friends

LIR2450 Li-Ion Battery and Charger

LIR2450 is a coin cell, Lithium-Ion rechargeable battery. Physically the same size as CR2450, LIR2450 can be used as a rechargeable replacement to CR2450 in most cases.
This little battery has little over 100 mA/Hour capacity, with nominal 3.6 V output. This battery is perfect for powering a small project.
The problem (for me) was that there were only poor quality chargers available for this very useful battery. Since I could not find a good charger for it, I made one.

This charger is based on the popular MCP73831 by Microchip to charge Lithium-Ion battery safely.
The charger is very compact and plugs right into an USB port.


  • Compact design plugs into an USB port
  • Charge/Done LEDs indicate the charge status
  • Charge current: 45 mA typical
  • Charge time: about 3 hours
  • Dimension: 1.15 x 1.45 x 0.38 inches

Purchase here

6 Responses

  1. Hi, do you still sell these chargers? And if not, can you provide a list of the materials you used to make them? Thanks in advance.

    March 17, 2016 at 5:31 pm

  2. Fred

    Will a LIR2477 fit in the holder?

    April 7, 2014 at 11:54 am

    • No it won’t fit. The space (height) inside the holder is about 6.2 mm.

      April 7, 2014 at 12:02 pm

  3. Peter Misenko

    Hi, I created similar charger but I have this problems: If I insert batery reversed, IC burn. Do you have any protection? After charging done both leds are on, Done led lihgting only few seconds. can you help me what is wrong?

    March 11, 2014 at 8:41 am

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