FEASIBILITY OF RECHARGING FAA IN-SERVICE DRY CELL BATTERIES.
FEDERAL AVIATION ADMINISTRATION WASHINGTON D C SYSTEMS RESEARCH AND DEVELOPMENT SERVICE
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The report explains the feasibility of recharging the presently used carbon-zinc batteries and also considers the use of other types which may have a better charge acceptance. It was found that, although the carbon-zinc battery is listed as being a primary cell, i.e., not rechargeable, it actually has a limited recharge capability provided the charging is done soon after discharge. Since most of our batteries are for emergency use, the loss of capacity is due to self-discharge rather than actual use. Inasmuch as capacity lost by selfdischarge cannot be replaced by charging, it is not recommended that a recharging program for carbon-zinc batteries be undertaken. A number of other types of batteries are better adapted for standby application, such as radiological equipment, and are more rechargeable than the carbon-zinc type. However, except for alkaline manganese dioxide-zinc batteries the cost of these other types is so high that their use cannot be justified on an economic basis. Recommendations are made for the use of secondary manganese dioxide-zinc batteries at some locations. Author