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Black rectangular Li-ion battery pack 3400mAh 7.4V

KingSener

KingSener BTNF-L7408W 3400mAh 7.4V standard battery

SKU CH-WVSQ-VBEJ5 MPN BTNF-L7408W

Replacement 3400mAh 7.4V Li-ion battery for South S82, S82T, K9, R90, R93 GPS and GNSS total stations

  • Battery capacity3,400 mAh
  • Battery voltage rating7.4 V
  • 3400 mAh capacity powers South S82, S82T, K9 and R93 GNSS units all day
  • 4 V output matches original BTSD-L7402W specification for drop-in replacement
  • Li-ion cells deliver stable voltage during long survey sessions
  • Black housing fits existing battery compartments without modification
  • Brand-new replacement battery backed by one-year manufacturer warranty

Replacement for South survey instruments

This 7.4 V lithium-ion cell delivers 3400 mAh and fits the South S82, S82T, K9, R90 and R93 GPS and GNSS receivers. It is a direct substitute for the original BTSD-L7402W pack and the BTNF-L7408W part number. Survey crews can swap it in the field without tools.

Not for other brands or higher-capacity needs

The pack only matches the listed South models and will not work with Trimble, Leica, Topcon or any other manufacturer. Buyers who need longer runtime than 3400 mAh or a different voltage should look at alternative power solutions.

3400 mAh capacity at 7.4 V

This single figure determines whether the cell can power your instrument for a full session. Verify that your device accepts a 7.4 V, 3400 mAh lithium-ion pack before ordering.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $32.99
Pricier than about 87% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameKingSener
Model nameBTNF-L7408 W
Part numberBTNF-L7408 W
Power
Battery capacity3,400 mAh
Battery voltage rating7.4 V

Questions about this item

Will the BTNF-L7408W fit my South S82T total station without modification?

The pack is a direct replacement for the original BTSD-L7402W and matches the South S82, S82T, K9, R90 and R93 models, so it slides into the existing battery compartment with no adapter needed.

What is the correct way to insert the battery, and what mistake should I avoid?

Align the contacts on the BTNF-L7408W with the terminals in the South instrument, press firmly until the latch clicks, and do not force it backwards — reversed polarity can damage the 7.4 V Li-ion cells.

When should I plan to replace this 3400 mAh pack?

Replace the battery when a full charge no longer lasts through a typical survey day or if the casing shows swelling, which signals the Li-ion cells have reached end of life.

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