Dual Coin Cell Battery Holders In-series (H04R2x)


2 x CR2032 Coin Cell Lithium Battery Holder In-series (3.3V output)

Stage: Production

25 in stock (can be backordered)


H04R2x is a compact coin-cell lithium battery holder that fits two CR2032 batteries in series. The output voltage is provided through Hexabitz SMD edge-pad connectors (3.3V on top and GND on bottom).

Note: This module does not ship with coin-cell batteries.


Technical Specifications

  • 2 x CR2032 lithium coin-cell battery holders in series (+3.3V output).
  • Six power ports (+3.3V and GND).
  • 2 x BLP2032SM-GTR SMD coin-cell holder with gold-plated contacts.
  • TPS76433DBVT 3.3V 0.15A LDO.

Physical Properties

  • Shape: Hexagon
  • Size: 30 mm short diagonal
  • Area: 7.8 cm^2
  • Weight: 4 g
  • Soldermask Color: Dark green
  • Finish: ENIG (gold) or HASL-LF (tin)


Please visit this product projects on Hackster.io network.


H04R20 BOM

Quickstart Guide

Download a PDF version here.


Frequently Asked Questions

A: Most CR2032 coin-cell batteries are about 200mAh capacity with a standard discharge current of 0.2mA and voltage of 3V. With two in series, you can get same capacity but double the voltage. The voltage is regulated back down to 3.3V to be compatible with other Hexabitz modules. You can also solder H04R20 modules together, connecting them in parallel, to get more capacity or use the sister module H04R10.

Have more questions? Please check our main FAQ page and feel free to contact us for any unanswered questions.


Download a PDF version here.


  • Schematics (PDF)
  • Hardware Design Files (Circuit Maker)
  • Documentation / Factsheet (PDF)
  • Projects & Examples: Please check our account on Hackster.io for demo projects and examples.