FDK HR-4/3FAU – NiMH 1.2 V 4500 mAh 4/3 FA

The FDK HR-4/3FAU (formerly Sanyo) is a high-capacity NiMH cell in the 4/3 FA size, supplied without solder tabs. It is ideal for building and repairing battery packs: diving lights, RC models, old laptop battery packs, and more.

Key features

• 4500 mAh typical capacity (4100 mAh minimum)
• Low internal resistance (approx. 20 mΩ)
• FDK-branded cell (formerly Sanyo)
• 4/3 FA size, to be spot-welded or fitted with tabs depending on the pack

Technical specifications

Model	FDK HR-4/3FAU
Size	4/3 FA
Chemistry	NiMH
Nominal voltage	1.2 V
Typical / minimum capacity	4500 mAh / 4100 mAh
Internal resistance	approx. 20 mΩ
Protection circuit	No
Connection	Without tabs
Dimensions	Ø 18.0 mm × 69.5 mm
Weight	approx. 60 g
Charging temperature	0 °C to 40 °C
Discharge temperature	0 °C to 50 °C
Contents	1 cell

Applications

Assembly and refurbishment of NiMH battery packs: diving lights, RC models, power tools, and medium-drain devices. Not recommended for very low-drain devices (clocks), due to the risk of deep discharge.

Safety warning

Do not dismantle, short-circuit, heat or throw into a fire. In case of leakage, avoid contact with skin and eyes. For a custom pack, our workshop can assemble the battery for you.