Amazon Basics NiMH

Amazon Basics NiMH Rechargeable AA/AAA Batteries

Reliable 1.2 V NiMH cells for the devices you use every week. Precharged out of the box, they can be recharged hundreds of times and work with most smart chargers. Ideal for game controllers, toys, headlamps, audio recorders, and classroom kits.

Use if / Avoid if

• Use if: You replace batteries often in medium- to high-drain gear (controllers, flashes, toys, portable audio).
• Use if: You want predictable performance and lower long-term cost with a simple two-set rotation.
• Avoid if: The device specifies non-rechargeable batteries only (e.g., many smoke/CO alarms, some smart locks) or sits unused for many months.
• Avoid if: You need maximum runtime in sub-freezing temperatures—primary lithium AA (LiFeS2) performs better in the cold.

Sizes and typical specs

• AA: Commonly 1900–2500 mAh depending on version; best for higher loads and longer runtimes.
• AAA: Commonly 700–1100 mAh; best for compact, lower-draw devices.
• Voltage: 1.2 V nominal (stable under load vs. alkalines that sag as they drain).
• Cycle life: Hundreds of recharges when charged cool and not deeply over-discharged.

Charging made easy

Use a smart charger with independent bays, automatic -ΔV termination, and temperature protection. Avoid basic “dumb” timed chargers.

• Recommended charge rates: AA at 0.5–1.0 A; AAA at 0.2–0.5 A for best longevity.
• Time estimate: Hours ≈ (battery mAh ÷ charger mA) × 1.2. Example: 2000 mAh AA at 500 mA ≈ (2000/500) × 1.2 ≈ 4.8 hours.
• Travel vs. bench: USB-powered compact chargers are handy on trips; desktop chargers suit larger rotations.

Quick runtime examples (real-world)

• Game controller (≈120–180 mA): AA 2000 mAh ≈ 8–12 hours per charge.
• Headlamp on medium (≈150 mA): AA 2000 mAh ≈ 10–12 hours; AAA 900 mAh ≈ 4–5 hours.
• Portable recorder (≈60 mA): AA 2000 mAh ≈ 20–26 hours.

Best practices for long life

• Keep two labeled sets per device and rotate them.
• Recharge when performance dips—avoid deep discharge.
• Charge and store in a cool, ventilated place; heat shortens life.
• Use matched cells (same brand/capacity/age) together in multi-cell devices.
• For storage beyond a month, leave 40–60% charge and top up every 3–6 months.

Compatibility notes

• Some devices read 1.2 V as “low” even when the battery is mostly full. If your device shows early low-battery warnings, test actual runtime—many still operate normally.
• Follow the device manual. For life-safety devices (smoke/CO alarms) or products that specify alkaline/lithium only, do not use rechargeables.
• Do not mix new and old cells or different capacities in the same device.

Alternatives to consider

• Higher-capacity NiMH AAs: Longer runtime but may self-discharge faster—best for camera flashes and shoots.
• Primary lithium AA (LiFeS2): Long shelf life, great in the cold and for emergency kits or outdoor sensors.
• Alkaline: Fine for very low-drain devices (clocks, some remotes) where replacements are rare.

Safety

• Only charge NiMH cells in a charger designed for NiMH.
• Stop using any cell that swells, leaks, or runs excessively hot; recycle it.
• Never attempt to recharge alkaline or lithium primary batteries.

FAQ

• Do they arrive precharged? Yes. Top them up before first use for best results.
• How many recharges can I expect? It varies with heat, charge rate, and depth of discharge. With sensible charging (cool, moderate rates), expect many hundreds of cycles.
• Why does my device show low battery early? Some devices assume 1.5 V alkalines. Despite the warning, NiMH often delivers full runtime; judge by performance, not the icon.
• Can I mix brands or capacities? In a charger with independent bays, yes; in a device, no—use matched cells as a set.
• What charger should I buy? Look for independent bays, automatic -ΔV termination, temperature/timeout safety, and selectable current.