A study of the rechargeability of the Red Camel lead-acid battery between +20 deg C and -30 deg C

The rechargeability of a group 24 esb Red Camel, lead acid battery was measured between +20C and -30C. The current charge dropped considerably when the temperature was reduced below 0C. The current efficiency (Rc) and energy efficiency (Re) including recovery after rest, for an applied voltage of 14.3 v and charge time of seven hours were 92 + or - 6% and 62 + or - 4% respectively at temperatures below 0C. The rechargeability was improved at low temperatures when the applied voltage was increased at low temperatures when the applied voltage was increased from 13.7 to 14.3 v. Above 14.3 v, however, parasitic reactions prevented a further increase in rechargeability.