Last year I bought the B&Q Performance Pro cordless power tool kit (sabre saw, drill, circular saw, torch), my major regret was that the kit didn't include a jigsaw and later I was irked by the cheap quality of the charger supplied which tended to overcook batteries.
I've just bought the B&Q PP 18V jigsaw which uses the same batteries (comes with 2 of) and best of all it comes with a decent 1 hour charger with a proper charge controller that disconencts the battery once it is charged.
Perfect. Buying the entire bundle (both jigsaw and other tools) costs £219 and gives a total of five batteries one good charger and one that works but is a tad annoying. Good tools for the price in my opinion.