MADISON, Wis. (AP) – People who buy a car battery and don’t turn in the old one may lose a few bucks more in the future.  A bill introduced by state Sen. Chris Larson would remove the $5 cap on deposits that retailers can charge when they sell an auomotive or other lead acid batteries.  Larson says the $5 limit doesn’t really encourage people to return their used battery.  That winds up hurting retailers because they pay manufacturers more than $15 deposit on each one.  The bill has bipartisan support in the Legislature. A similar proposal failed last year in the Assembly.