Listing is for a 2-pin laptop cmos battery. These work with any brand laptops (dell, lenovo, acer, hp, etc...) as long as the battery connectors match. The connector is shown in the photos.

Item Features
Great Part to replace the broken and non working CMOS Battery for Dell Latitude E7240 E7440 E7250 E7450 E7270 E7480 E7280 E7470
High capacity  battery
The real time clock battery CMOS BIOS backup battery with two wires two pin connector
Will fix the following error codes: Systems battery error / System CMOS checksum bad / System Timer error / Real-Time Clock Error 
2 Wires - 2 Pin Connector
Voltage: 3V
Length: 6.5 cm