Steve Wheeler is attending the M-Learning sessions at the ALT-C conference along with a few other edubloggers, and recounted one of the issues they explored in their session on “Tensions Between Personal Space and Social Space”:
By far the most important issue for our small group was the problem of finding somewhere to top up your battery when it goes flat. How could this be achieved…?
One method an educator could already employ is the use of the portable power pack. These are essentially a portable, large capacity battery, usually with a couple of outlets for dispensing power for various devices (the largest models are capable of powering a laptop for several hours) including USB ports which are capable of recharging most mobile electronics. However, these can be somewhat heavy and bulky – about the size of a large external hard drive unit – and therefore somewhat contrary to the idea of mobility!
I recently purchased three very small, portable and cheap mobile power units which I can recommend to other mobile educators. The units are powered by rechargable AAA batteries, and can be recharged themselves by plugging them into a USB port (the unit becomes a AAA battery recharger… neat!). They each dispense sufficient power to fully recharge several mobile phones (or PDAs) to full capacity; and should even this capacity prove insufficient, normal AAA batteries could be used to replace the rechargable ones, providing additional power.


The units are tiny – only slightly larger than four AAA batteries side-by-side; and each unit (minus batteries) costs less than $10, including shipping, from this site: http://dealextreme.com/details.dx/sku.3205
. For the greatest capacity, I’d recommend using good-quality 950mAh
rechargable Ni-MH batteries, which would provide a total potential power capacity of almost 4000 mAh.
There’s also a bit of an additional gimmick – there’s a built in LED flashlight in each unit, so it doubles as a long-duration torch. Illuminating stuff indeed.
There are also solar-powered versions of this portable-power concept. This model, for example, has two USB ports (and could thus be used to charge two mobile devices simultaneously).


However, these solar models generally take several hours to recharge an internally-sealed battery. This is why I think a rechargeable power source with easily-replacable batteries is more flexible and reliable for most situations.
If anyone else has ideas on how to ensure mobile learners can power their devices on the go, I’d be very keen to hear from you! Please post your comments!
technorati tags:power, mobile, portable, battery, batteries, pack, AAA, rechargable, recharger, mobile, devices, phone, charger, m-learning, mlearning, mobile learning, mobile-learning, mobilelearning