Dear *****, thank you for your reply. The drill will only run for about 2 - 3 minutes after a "re-charged" battery is fitted. I believe both batteries are the same age but I cannot say for sure - they certainly behave the same. Apart from the reference on the drill starting J4... there is another ref. - C342809R along with the number - 2011. I think the drill was bought that year but it could be a bit older. Obviously I don't want to buy replacement batteries if the fault lies with the drill or the charger. Many thanks, John
Many thanks for your help. Much appreciated.
Many thanks and best wishes to you.