Battery Hp Envy Touchsmart 4 681879-171/54 681949-001 Tpn-c102 El04XL HSTNN-IB3R ENVY 4-1000
Specification:

Battery type:Li-on
Voltage:14.8V
Capacity:3400MAH/52wh
Warranty:12-Months Warranty 

Replacement For:

 HSTNN-IB3R HSTNN-UB3R EL04XL TPN-C102  681879-1C1 681879-171 681879-541 681949-001

Compatible with Models:

HP Envy TouchSmart 4 Series