Rome Tech BIOS CMOS battery best suits to replace your broken or non-working old battery - we provide premium quality only CR1220 replacement battery compatible with Dell Venue 11 Pro 5130; Dell Venue 11 Pro 7130; Dell Venue 11 Pro 7139; Dell Venue 11 Pro 7140 Enjoy extended reliability of the CR1220 battery and heat shrink of a high caliber - the CMOS battery will last you for a long time The size of the entire unit is extremely small - will fit in almost any electronic device requires Battery regular connector with 2 pins and 2 wires Quick and simple battery installation takes only 10 minutes of your time. Try our customer service for resolving any issues during battery replacement