How much play time could you get on a GBA SP?

Question

What was the battery life for a GBA SP?

Answer 1

10 hours continuous play with light on

18 hours with light off

Answer 2

On the brighter setting, the average battery life is approximately 7-10 hours (depending on the model of Game Boy Advance SP you have). Battery life can be extended when using the dimmer settings.

source:http://www.nintendo.com/consumer/systems/gameboyadvance_sp/battery_faq.jsp#recharge

Answer 3

7-10 hours on a new battery, however!  Keep in mind an older battery will have significantly less playtime.

Answer 4

I'd say about 8-9 hours on a good battery.