Join Date: Jun 2011
Location: Oregon Coast USA
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Having been the RMA person and also having worked in QA for a battery manufacturer and seller, if a battery actually is maintenance-free opening it will shorten its life since the designed internal pressure is necessary for elements in the gas and electrolyte which are produced in use to recombine with the elements in the plates. There is an internal valve which is designed to vent excess pressure, which if the battey is correctly designed, will only occur if the battery is abused, usually by sustained or high voltage/amperage overcharging. We have had several maintenance-free batteries in various vehicles which have lasted for years with no maintenance apart from keeping the llids and terminals clean. The exceptions were two Delcos in different cars, one which died prmaturely and the other developed a cracked case and leaked.
Apparently the Furukawa batteries were either badly designed or improperly manufactured since there have been many forum comments about failures and problems such as low electrolyte levels. It will be interesting to see how well and for how long the Johnson Controls batteries as in my '11 RAV function.
2011 Upgraded Base V6 4WD
2007 Kawasaki Vulcan 900 Classic LT
2002 Craftsman LT1000 V2
Jesus is Lord
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