RS used to do fibreglass scratch pens for track cleaning. Garry blocks also are a help.

Is this a photography strobe or come and find me if I am in trouble beacon. If the latter get a new one.

regards Martin

Faber Castell still make fibreglass erasor pens which I used to used many moons ago when I was a draftsman on a drawing board. Used to use them for modifying ink drawings. Still remember getting itchy hands after brushing the broken fibres with my hand.

Paul.

If you have a fast charger, please make sure the cells you select are capable of accepting that maximum charge rate.
A few years ago I replaced a couple of duff cells in a Skill battery pack (with Maplin cells of the same capacity, and claimed charge rate).
Everything worked fine for several recharges.
One day I pressed the Fast Charge button and wandered downstairs to make a brew.
A little while later there was an exceedingly loud bang from the bedroom.
One of the new cells had expanded and blown the end out. The insides followed leaving a spring like Zeberdee.
The adjacent cell was blown straight through the plastic case, and made a sizeable dent in the bedroom ceiling.

Bill

Replace the negative wires, black wire corrosion wont go away.

Buy good cells with a long date