Spare KLOM Euro Charger. You will still require an adapter, (?1 from a pound shop) so if you have damaged or lost your charger, then here's your chance to replace it. This is the one that comes with the KLOM EPG.
After a while your needles will start showing the signs of wear and tear and very occasionally you might snap one. You may also simply mislay them, either way it's nice to have some supplies and this set of three is now available for a reasonable price. Although these needles are compatible with other guns (including electrics) I would confirm on the forum if you have a different pick gun before commiting to buy.