ProMark 3 Batteries

If you were to decide to replace the batteries in a ProMark 3 (or MobileMapper CX) yourself, a good source of replacement batteries would be:

https://www.digikey.com/product-detail/en/elna-america/DSK-3R3H224U-HL/604-1020-1-ND/970232

DSK-3R3H224U-HL Elna America | 604-1020-1-ND DigiKey Electronics

The part is actually a 220 mF super cap. (That is milli-F, not micro-F!)

They are less than a buck-fifty each.

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