12V 7Ah-9Ah 151x65x93mm battery cover for cigarette lighter receptacle
thingiverse
This is a protective case to hold a cigarette lighter receptacle, a switch and an indicator for battery charge status from aliexpress.com. If you have a 12V USB charger and an old UPS battery on hand, you can use this to create a handy little power bank at a low cost. Edit 2019: I added a cutout for the new, more available battery meter found here https://www.aliexpress.com/item/12V-84V-Lead-acid-Battery-Capacity-Indicator-Voltage-Meter-Voltmeter-LCD-Monitor/32887977274.html?spm=2114.search0104.3.213.23c64d86OGIGUh&ws_ab_test=searchweb0_0,searchweb201602_1_10065_10068_319_10059_10884_317_10887_10696_321_322_10084_453_10083_454_10103_10618_10307_537_536_10902,searchweb201603_56,ppcSwitch_0&algo_expid=c285289a-5792-47f5-838d-b5458e2d6f02-31&algo_pvid=c285289a-5792-47f5-838d-b5458e2d6f02
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