1.5 Amp Three Stage Onboard Battery Charger Maintainer with LED Indicator; Equipped with overload protection， short circuit protection， and reverse polarity protection<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Three-stage fully automatic charging protects and prolongs battery life </span></li><li><span class="a-list-item"> Auto on/off trickle charging stage keeps 12 volt batteries fully charged without overcharging </span></li><li><span class="a-list-item"> Equipped with overload protection， short circuit protection， and reverse polarity protection for added safety </span></li><li><span class="a-list-item"> Also great for maintaining batteries while in storage </span></li><li><span class="a-list-item"> Has LED charge indicators </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31fJ4yxoXdL.jpg" noproxy>