Bicycle alarm some way to make battery last
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So my last alarm was this one https://www.ebay.com.au/itm/110db-Siren-Alarm-Lock-Security-Anti-Theft-Padlock-Door-Motor-Bike-Bicycle-AZ/153187862571?epid=18021235427&hash=item23aab5482b:g:QwEAAOSwuGZbo1Ob:rk:23:pf:0
and it takes several button batteries which dont last long. Waste of money....