My daughter has just got her first phone on starting high-school, due to a complicated public transport ride making it necessary for her to be able to report in if missing connections etc.
Due to the chaos caused by her friend's "dead-phone-while-on-wrong-train" experience last week, I want to put some sort of backup power source into her school bag for emergencies. It must be light as the school bag is already plenty heavy.
So I want something that is as small and long-lasting between charges as possible, while the capacity is not so important as it is only intended for emergencies.
I've scoured the forums and deal comments and Xiaomi gets a good rap, but they all seem to be quite large high-capacity devices.
Not sure what's best
- a spare battery (kept charged)
- a $3 AA-powered powerbank with 2 eneloops on board
- a decent quality rechargeable powerbank
Any comments welcomed.
Spare Battery - Cheap, and not bulky at all.