I have 2 Bosch GSB VE 2 LI drills about 18 months old. the batteries are perfect. over a period of time the drill just doesnt seem to be rotating as fast as it used to even with full charge. would the brushes affect its performance or am I missing something obvious??

Gareth Williams, April 2013

You say you have two of these which suggests that you do a lot of drilling - needing to have two - and presumably you use them to do different work - not needing to change the tool.

You suggest but do not say specifically that only one of them has developed slowness.

Brush wear might be a factor and so might environment - your work might create dust contamination that's getting inside - possibly gumming up the bearings or the commutator.

But....
In the UK Amazon sell brushes for this model £1.69 + £3.99 delivery.

Good luck...

Peccavi, April 2013