Very old battery (original) could not hold a charge, was discharging much too quickly.
Went off without a hitch! I'm a 71 year old man relatively competent when it comes to fixing things around the house. When I saw the "microscopic" screws I had to deal with I began to wonder what I had got myself into. I have fairly shaky hands but soon found out that with the tools provided in the kit and the on-line instructions provided, the whole operation was really no big deal. Way to go guys!!! You've got a great thing going here. You saved me about $60 in repair costs from a local repair station!
A hand held magnifying glass is handy. I needed mine to get a good look at everything.