I have just purchased a remote controlled hovercraft which uses a
rechargeable 9.6 volt 700 Mah battery. The craft only works for about
8 minutes per 4 hour charge. I would like to buy a replacement
battery.
I see 9.6 volt 850 Mah ones of the same size available. Would this
hurt the electronics or just provide a longer charge for the machine?

Sorry to bother with such a basic question for you all.
Please reply to me e-mail if possible.

Thank-you

Daryl