Where is the best place to buy a decent quality replacement battery ?

 

Try:
Carshops, (some have special offers, ie: higher spec batteries on sale prices),
Motor factors,
Auto electrics, (as for carshops),
Halfords are usually OK, will price match and if you find it cheaper.......... They also have a good range, from low to high spec.

Alcazar

 

Costco if you can get in, they do Bosch. 6DA fits the newage OK, got one on mine.

 

Andrew Page Motor Factors also sell the Bosch asia silver 6DA batteries. There are loads of branches around the North East. Just fitted one to mine. Very happy with the performance so far.