Check the listing for details. CLIFFORD VIPER PYTHON 7941V/P/X real New Replacement Battery. Condition: New. Listed at 15.00 USD. with life time warranty ORIGINAL batteries for your CLIFFORD or VIPER or PYTHON 7941V/P/X, 7944V/P/X, 7945V/P/X remote WORKS FOR: 7941V, 7944V, 7945V (VIPER)7941P, 7944P, 7945P (PYTHON) 7941X, 7944X, 7944X (CLIFFORD) The below are the model numbers that this battery will work for5904 (part# 5904V)5902 Part# 5902V)5501 (part# 4702V)5901 (part# 5702V)4704 (part# 4704V)5704 (part# 5704V) Simple instructions included, easy to do yourself. It's not a knock off but the same ones used in your remote when it was bought brand new, it will hold a charge better then your old one as they made improvements to the originals, being these are the original batteries it won't damage your expensive remote, SELLING BATTERY ONLY, super easy to remove and replace yourself. I will include documentation on how to do that yourself. Life time warranty, if the unit goes bad we will replace it for as long as you own the unit.