Custom AAA NiMH (1.2V) Charging Station – 3D Printable

You can use this:

Description

This is a custom 3D printable charging holder designed for AAA NiMH rechargeable batteries (HR03, 1.2V).

The design is compatible with standard AAA NiMH cells between 600mAh and 1000mAh, including 800mAh models like Varta, Panasonic Eneloop, Duracell, etc.

⚠️ Important:
This holder is designed for NiMH chemistry only (1.2V nominal).
Do NOT use with:

Alkaline batteries

Lithium batteries

1.5V disposable cells

Li-ion / 10440 cells

Charging must be done using a proper constant current NiMH charger circuit.

Compatible Battery Specifications

Size: AAA (HR03)

Chemistry: NiMH (Nickel-Metal Hydride)

Nominal Voltage: 1.2V

Fully Charged Voltage: ~1.4–1.45V

Capacity Range: 600mAh – 1000mAh

Recommended Charging Parameters

For 800mAh battery:

Standard charge: 80mA (0.1C) for 14–16 hours

Fast charge: up to 400mA (0.5C) with delta-V detection

Always use proper charge control.
AAA
NiMH
Battery
Battery Charger
Rechargeable
HR03
1.2V
Electronics
DIY
Power
Charging Dock
Maker