In message <83E03F5C.11E90F64@xs4all.nl>, marcel writes >Alkaloid battery's very big from Russian army does anyone know how to >maintain >them . >They are 5 cell's 24 volt's iron casing and have a refill plug on top >with a rubber valve >to release gas pressure. >How do we find out what alkaloid is used an can we refill them with >sterilized water It's "alkaline", not "alkaloid". *Many* years ago these were quite plentiful in the UK as war surplus. I think they were also called NiFe cells (nickel-iron) and they used either sodium or potassium hydroxide as the electrolyte (I forget which). They were practically indestructible, as I recall. You should be able to find details on how to use them in a good library. Leon -- Leon Heller: leon@lfheller.demon.co.uk http://www.lfheller.demon.co.uk Amateur Radio Callsign G1HSM Tel: +44 (0) 118 947 1424 See http://www.lfheller.demon.co.uk/dds.htm for details of my AD9850 DDS system. See " "/diy_dsp.htm for a simple DIY DSP ADSP-2104 system.