hi,
since raul replied to you i n spanish i can't know whether i am repeating information he has already shared, but I can tell you that the special drilling bit is available from SMH parts (www.smhco.com) i believe you need an account to buy parts from them if you do not have an authorised dealer in your area. I try to avoid battery repairs myself, preferring to call in an o/s supplier. If you want to hang on a bit I will get the make model and serial number of the electronic tester we have and the part number of the post drill bit from SMH or TVH if I can find it.