Which batteries are compatible with the DeWalt DW9107

There are several important factors when replacing a battery with a different one:

• Form factor: size, shape, terminal type and location should ideally be the same. This can be worked around in most cases, just make sure the battery will fit somewhere and that you can wire it properly.
• Voltage: must be identical
• Chemistry: the existing charger probably only handles lead acid batteries, which all the ones you linked to are
• Capacity: measured in Amp Hours (Ah). This is the total capacity of the battery. It needs to be similar to the old one. Too low and the pump wont run as long. In most cases higher is ok, but a lot higher could cause tue charger to overheat.
• Maximum current: Measured in Amps (A). Sadly not all batteries will list this. It needs to be the same or higher. A battery that can't supply enough voltage to run the pump wont work.

If you can't find the exact specs of the battery, in general if the original and replacement batteries are the same physical size and same chemistry (both lead acid), the capacity and max current will be similar enough that they won't cause problems.

The classic fix for electronics that have been dunked in water is to put the item in a sealed plastic bag with a bunch of uncooked rice for at least a few days. The rice will draw the moisture out of the electronics, and you might get lucky.

Alternately (and I have no personal experience with this), it seems like Ryobi has a good warranty policy. If the rice doesn't work, you might try that route.