How to Charge Rechargeable AA and AAA Batteries

Quick answer

To charge USB-C rechargeable AA and AAA batteries, plug each battery directly into a USB-C port using a suitable cable and power source. Follow the steps below to do it safely and efficiently.

How to charge your USB-C rechargeable batteries

1. Check the battery type and port: Confirm your battery has a USB-C port. Most USB-C rechargeable AA and AAA batteries have the port on the positive terminal end. If you're unsure, check the product label or manual. Don't try to charge non-rechargeable batteries – they can leak or burst.
2. Use a suitable USB-C cable and power source: Plug a USB-C cable into the battery's port, then connect the other end to a USB power source like a phone charger, laptop, or power bank. Use a cable that supports power delivery; most standard USB-C cables work. Avoid using a high-wattage fast charger unless the battery supports it – stick to a standard 5V charger to be safe.
3. Charge each battery individually: Connect each battery to its own USB-C port. Do not try to charge multiple batteries in series or with a splitter, as this can cause uneven charging and damage. If you need to charge several batteries, plan to charge them one at a time or use multiple ports.
4. Monitor the charging process: While charging, the battery may get slightly warm – this is normal. If it becomes hot to the touch, unplug it immediately. There's no indicator light on most models, so check periodically. Never leave charging batteries unattended for long periods.
5. Unplug when fully charged: Once the battery is fully charged, disconnect it from the power source. Overcharging can reduce battery lifespan, even though these batteries have built-in protection. If you're unsure if it's charged, a full charge typically takes a few hours – check the product specs for exact time.

Products mentioned

• AA USB-C Rechargeable Battery: The AA USB-C Rechargeable Battery has a 1700mAh lithium-ion cell and a steady 1.5V output, and can be recharged up to 1,000 times. This means you can rely on it for high-drain devices like gaming controllers and cameras, and it will last for years with proper charging habits.

  

• AAA USB-C Rechargeable Battery: The AAA USB-C Rechargeable Battery uses advanced lithium-ion technology for a steady 1.5V output and supports up to 1,000 recharge cycles. It's a compact, lightweight option for everyday household electronics, saving you money and reducing waste compared to disposables.