“3 screws to remove and voila! Out comes the OEM battery, about 3.5 years old.
Take the cap off new battery, push new battery in and refit 3 screws and plug it into the charger for a couple of days and use it.
Easy to fit, follow directions & see YouTube
Not sure of longevity, as it is only a couple of weeks old.
Battery lasts a bit longer, (not much), than the OEM battery when it was new.”