Pentax 1821 , 29518 , 38403 , 46607 , 52030 , DEP001 , D-LI1 , DPE004 , EI-2000 , EI-D-LI1 Replacement Battery Replaces 7.4V BATTERIES: 29518 38403 46607 52030 C8872A EI-D-LI1   FITS Following GPS / Scanner / Camera survey equipment PENTAX 1821 29518 38403 46607 52030 DEP001 D-LI1 DPE004 EI-2000 EI-D-LI1   Battery Type: Li-on Battery Voltage: 7.4V Battery Capacity: 2000mAh (Extended battery for longer life) IS YOUR AH RATING IS DIFFERENT? The AH (Amp Hour) Rating is the storage (or fuel) of the battery, the higher it is the longer the battery lasts between charges, bit like petrol in your car so a higher or lower one makes no different to the performance, just the length of time you can use the battery for between charges. Colour: N/A