[Wing] Gel cells

[Bruce Jaques]

The following is extracted from a letter from Brad Overhaulser of  Pelican Aviation in Costa Mesa, Ca. 

"Gel cell batteries, for some reason, require higher charging voltage than "wet" batteries of the same rated voltage.  Globe Union Gel-Cell Batteries specifies 14.6 volts plus or minus 0.2 volts.  Since most automotive voltage regulators are set up for 13 to 13 1/2 volts, a regulator which is adjustable or pre-set at a higher level must be used.  If not, the battery will weaken through under-charging.  

My Uap/Napa gel instructions state to adjust the regulator to 14.1 volts. Other useful information: always use a charger with a regulator because a cheap trickle charger will ruin a gel cell battery. 

I don't know how old the information is that I'm forwarding but it says adjustable regulators are available from Aircraft Spruce or Van's.  

Bruce Jaques 
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