Most phone users have had the experience of realizing their battery is dead while they are away from a wall outlet. Even if outlets are available, if other devices are plugged in, it can be inconvenient and frustrating to have to choose which device to use. You may wish for a phone with unlimited battery life. While that is still a dream, a 2 amp power bank is the next best thing.

Power banks are external battery chargers. You charge them on a computer or wall outlet, and then unplug them to keep as a battery charger for phones and other devices. If you’re looking for a power bank, make sure it is compatible with your device. Some have adapters that allow them to be used with different devices, such as earlier Apple products.

Tech-port offers a 2 amp power bank that is compatible with most major phone brands. It can charge three devices at a time and has a durable battery that can be recharged at least 500 times. It is small enough to carry in a purse, backpack, or briefcase, so you can have it whenever you need it. The design is edgy and futuristic.

An even smaller option is the RAVPower Portable Charger. A slim tube available in many colors, it is small enough to fit in your pocket. Despite its small size, the device gives up to 14 hours of talk time or 90 hours of music playback. It looks similar to Apple devices, but is compatible with most phones.

When you’re caught with a dead battery, a power bank is just what you need. On camping trips, plane rides, or long commutes, a power bank ensures you never have to be without your phone. If you’re frequently away from an outlet, carrying a power bank can give you peace of mind.