4ER21/433 /440


They are unattended primary current sources of constant readiness and are intended for installation in the power battery of the downhole telemetry system LWD. They are analogues of the 4Cell 21-100-165 MR and 4Cell 25-100-165 MR blocks (manufactured in the USA).


Blocks consist of sequential assembly of 4 elements of the CC-MR-165 (G) series (21 / 25mm) of the electrochemical system of lithium & ndash; SS thionyl chloride, manufactured by Vitzrocell Co., Ltd (South Korea). The entire assembly is laid in a heat-resistant tube and has connecting connectors at the ends.

Key Features:

Parameter Name Value
Maximum amperage (A) 0.25
Voltage (V) 13.40
Rated capacity (A·h) 9.00
Temperature range (°С) 0..+165
Final discharge voltage, not less than (V) 8.00
Rated Discharge Current (A) 0.12
Warranty period (years) 3
Maximum impulse discharge current at l.p.d(A) 0.70
Weight (kg) 0.33
Open circuit voltage (V) 14.60

The provided characteristics make it possible to predict the operating time of the current source under various operating conditions.

Fire, explosion and severe burn hazard. Do not recharge, crush, disassemble, heat, above 165°C, incinirate, short circuit or expose contents to water