Upgrade MB870 Question.

[dlw1146]

I have an MB870 that I would like to upgrade to CM10.
Major problem however. The USB port is defective.
Can not connect to PC, nor can it be charged.
I have extra batteries and a charger. Change batteries every morning. Keep extra in car.

Is there any way to upgrade by downloading the software to an external SDcard?

Any help appreciated.
dlw