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Six rectangular 9 V NiMH cells in light blue wrappers, 300 mAh each

Accupower

Accupower 9 V NiMH 300 mAh 6-pack standard battery

SKU CH-FM0J-NTQ1Q

A six-pack of 9 V NiMH rechargeable cells rated at 300 mAh and 8.4 V, rechargeable up to 1000 cycles with no memory effect

  • Battery type9 V
  • Rechargeable up to 1000 cycles for long-term value
  • 300 mAh capacity delivers steady power for 9 V devices
  • NiMH chemistry eliminates memory effect for flexible charging
  • 4 V output fits any product using standard 9 V batteries
  • Six-pack supply keeps multiple devices ready at once

Six-cell NiMH 9 V pack

This six-cell pack supplies 300 mAh NiMH cells rated at 8.4 V nominal voltage. They suit devices that accept standard 9 V form-factor batteries such as smoke alarms, wireless microphones and test instruments. The chemistry avoids memory effect so partial recharges do not reduce usable capacity.

Sustained discharge behaviour

Rated capacity is delivered over repeated cycles rather than a single burst, with the supplier quoting up to 1000 recharge cycles. Voltage remains stable through the middle of each discharge curve, so devices that draw steady current see consistent runtime. Self-discharge is typical for NiMH, so cells stored for months should be topped up before critical use.

Installation notes

Cells slot into any 9 V compartment without modification, matching the physical dimensions of alkaline equivalents. Polarity follows the standard snap connector layout, so reversal is the only common error. A charger designed for NiMH 9 V cells is required; using an alkaline or lithium charger will not terminate correctly and can damage the pack.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $62.99
Pricier than about 91% of the 10,440 comparable items (median $10.99).

Specifications

Power
Battery type9 V

Questions about this item

How much heat or noise do these 8.4 V NiMH cells produce when powering a device continuously all day?

NiMH chemistry generates negligible heat and no audible noise during normal discharge, so the pack runs silently and stays cool in typical 9 V applications.

What charger do I need to recharge these 300 mAh 9 V batteries?

Any charger designed for 9 V NiMH cells with a termination method suited to 300 mAh capacity will recharge the pack safely.

Will these 8.4 V NiMH batteries work in my older smoke alarm that originally took alkaline 9 V cells?

Yes — the 8.4 V nominal voltage fits any device that accepts a standard 9 V form factor, and the lack of memory effect means they can be topped up whenever convenient.

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