- Physical Size: Portable chargers come in all shapes, dimensions, and weight. Physical size and battery capacity go hand in hand. If you are looking for an ultra portable charger, you will have to sacrifice battery size.
- Battery Capacity: You’ll want to determine how much power you need and how often you’ll want to charge your power bank. If you’re just looking for a power bank to keep your bag in case of emergencies, a power bank under 5,000 mAh will suffice. If you want to be able to use your power bank multiple times before having to recharge it, aim for one with more than 10,00 mAh.
- USB Ports: The more ports the power bank has, the more devices you can charge. Many chargers come with 2 ports: one 1A port and one 2.1A port.
- Charging Output: Most portable chargers will come with either a 1A or 2.1A output port or both. These numbers denote the maximum rate of charging in amps. So the higher the amperage, the faster the device will charge assuming it’s compatible. A 1A output port is suitable for most smartphones whereas older phones (such as feature phones and flip phones) require a 0.5A port. Tablets, iPads require a 2.1A outport for optimal charging. Power banks capable of charging laptops will likely come with a 3A port.
- Casing and Material: If you plan on using your external battery pack outdoors, you’ll want to choose one made of durable materials like aluminum or silicone.
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