Apple iPhone Apple Tablet Keychain Pocket Charger.

To preserve battery lifespan, use and recharge at least once every 4 months. Now, depending on your usage you may have to charge the power bank more frequently. Soon as you receive your power bank, make sure to fully charge it before using it completely. Keep battery dry and away from moist and corrosive areas/materials. Make sure to use the appropriate charger that came with the power bank in order to prevent any damages. Do not drop, knock, disassemble or attempt to repair the product yourself, please take it to a professional.