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The 16 'L' designates "Big Crank", it is a good battery, but the car WILL drain it down after about 5 days, unless you unhook the battery terminal. Mine has been re-charged plenty of times and is still going strong. You can also mount them sideways etc. If you want a battery that wont drain (Ie: more practical), get a standard heavy lead acid battery so you don't have to deal with high-maintenance charging etc. 
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