Looking for a reliable and long-lasting battery for your electronic devices? Look no further than the USB 18650 3400mAh 3.7V with Protection Board (2PCS). This rechargeable lithium battery is perfect for a variety of devices, from flashlights to cameras to power banks.

But before you place your order, please note that this battery is not compatible with AA or AAA devices. Make sure to check if your device can use this battery before purchasing.

For optimal performance, we recommend fully charging the battery if it has been unused for a long time or if it is being used for the first time. And for safety precautions, do not heat, dissemble, or put the battery into fire.

It is also important to not mix old and new batteries or use different types or capacities of batteries together. And when charging or inserting the battery into your device, make sure to not reverse the polarity.

To charge the battery, you will need a Li-ion 18650 rechargeable battery charger. And remember, do not charge the battery for too long to avoid any potential hazards.

Before using the battery or charging it, please remove the cling clear plastic wrap for optimal performance. With the USB 18650 3400mAh 3.7V with Protection Board (2PCS), you can trust in its quality and reliability for all your electronic needs.