We have introduced many large-capacity power banks, but if you need a portable option, the following ultra compact backup battery may be more suitable for you.
This is a practical, portable power bank that just measures 96 x 24 x 23mm and weights 65g. As we can see from the images, the power bank features ultra compact design along with colored casing in order that you can take it with you anywhere without adding too much bulk, you even can attach it to your keychain using its lanyard. Moreover, the built-in 2600mAh backup battery allows you to conveniently charge your smartphone or other USB-enabled mobile device on the go. Apart from that, its LED indicator shows you the status of the backup battery.
The ultra compact backup battery is available in 4 colors, each one is priced at $20 USD. If you’re interested, jump to USBGeek online store for more details. Additionally, If you need other options you might like to check BOLT portable backup battery and more via “backup battery” tag.