[jj2me]

If the contacts can be made to match, and it's just a matter of the extending part being too short, perhaps the holding of the battery against the contacts can be done with rubber bands, or a clamp, or some similar jury rig.

The second charger I linked wants to clamp the battery with its two contacts coming straight down onto the battery's contacts, so you need the contacts on the battery to face upwards when laying the battery on a flat surface in order to use that charger.