:: DWS - Danan Wingus Sakti PT.::

The Metrolog down hole memory gauges are powered by special lithium based batteries, called Smart batteries.

Thanks to the very low gauge consumption, the Smart batteries last much longer than usual lithium batteries. Moreover, special Smart batteries can be used for extra long duration jobs (up to 2 years).

A Smart battery knows what its initial energy is. During use (when the gauge is in acquisition mode), the battery records the energy used by the gauge, taking into account the surrounding temperature, the current programming and the actual gauge consumption. The remaining energy is recorded by the battery by subtraction. The parameters needed for the calculations and the required statistics are stored permanently in the battery, so a battery can be switched from one gauge to another without information being lost.

Smart batteries are designated by a letter and a two digits figure. The first letter indicates its voltage and geometry. The two digits figure indicates its maximum operating temperature in 10 °C

Name	Part number	Max. operating temperature		Used for
Name	Part number	(°C)	(°F)	Used for
Type E
E15E	D.30.B.E15E	150	300	CGM with 86000 points and 1.25" OD AMEtrolog with serial number < 8299
E18	D.30.B.E18	180	350	CGM 86000 points (up to 160 °C or 320 °F)
Type F
F15E	D.30.B.F15E	150	300	CGM with 174000 or 350000 points,1.25" OD AMEtrolog with serial number > 8300 and Multilog (including Flolog and TAMEtrolog)
2F15E	D.30.B.2F15E*	150	300	idem but for long duration operations
F16 E	D.30.B.F16E	160	320	CGM 174000 or 350000 points (up to 160 °C or 320 °F)
Type H
H15E	D.31.B.H15E	150	300	1" OD AMEtrolog
Type J
J15E	D.31.B.J15E	150	300	1" OD AMEtrolog with serial number > 8300
Type L
L15E	D.50.B.L15E	150	300	iGauge, iQuartz
2L15E	D.50.B.2L15E	150	300	iGauge gas lift and iQuartz
Type P
P15E	D.55.B.P15E	150	300	PRM4 and CGM4