I get many questions about which chargers will work for the Kobo Vox and Arc, both here and at the store, so I thought I’d give them a post all their own.
The short answer is, you need a 2A 5V micro USB charger. So, 2 amps, 5 volts.
Most micro USB chargers are 5V, but not all are 2A.
The Kobo Vox was built with proprietary technology built into the charger – which means that using non-Kobo chargers can be problematic. If it isn’t a Kobo charger, the Vox doesn’t register battery charge levels properly. The battery may be fully charged, but it won’t know. Most of the time this isn’t an issue, but sometimes it can lead to the Vox turning itself off due to what it thinks are insufficient power levels. You can
buy a charger directly from Kobo no longer buy chargers from Kobo, they aren’t even listed on the site. You can try and see if you can search out a used or refurbished one, but Vox users may be out of luck at this point.
For both the Arc and Vox (and many other tablets, like the Nexus 7), it is vital to get a 2A charger. Imagine your battery as a pool of water. Using the battery drains the water. So, you have to refill the pool. The number of amps is the width of the hose you’re using. If you try to charge your tablet with a charger that has insufficient amperage, it’s like trying to refill that pool through a drinking straw. It’s going to take an awfully long time, and the water is going to keep draining away faster than you’re filling it.