How long a tablet’s battery lasts is important, as it defines how long it can be used away from a source of power. Although there are such as in-car chargers, at some point a tablet may well be away from a source of power.
The Sannuo 10.1″ Kids Tablet has a stated battery life of 4-5 hours. Though battery life does vary depending on the usage – playing games will typically use more power than reading ebooks, and WiFi and Bluetooth can be turned off when not being used – this is still on the low side for a modern tablet. Many tablets have better battery lives but few if any have less.