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Black rectangular lithium-ion replacement battery, 7.4V 3400mAh

KingSener

KingSener BP-3 7.4V 3400mAh laptop battery

SKU CH-DJ12-50T31 MPN BP-3

Replacement 7.4V 3400mAh Li-ion battery fits Stonex S3 S8 S9 and UniStrong G970 RTK GPS GNSS devices

  • Battery voltage rating7.4 V
  • Battery capacity3,400 mAh
  • 3400 mAh capacity extends field runtime
  • 4 V lithium-ion cells deliver stable power
  • 100 % new replacement matches original dimensions
  • Compatible with Stonex S3 S8 S9 and UniStrong G970 RTK GPS GNSS
  • Charge above 80 % monthly when stored long-term

Compatible GPS battery replacement

The KingSener BP-3 is a 7.4V 3400mAh Li-ion battery built for Stonex S3, S8, S9 and UniStrong G970 RTK GNSS receivers. It matches the original dimensions and connector layout so field crews can swap it without tools or adapters. Surveyors who need a fresh power source for daily stake-out sessions will find it a direct fit.

Steady output during long surveys

High-quality cells and a protected PCB deliver stable voltage across the full discharge curve rather than a brief peak. The pack is rated to hold at least its design capacity when fully charged, giving consistent runtime for extended kinematic or static observations. Conditioning the pack with two or three full charge and discharge cycles from low current helps the cells settle to their true capacity.

Replaces worn OEM packs for Stonex and UniStrong

This unit substitutes an ageing original battery that no longer holds a full day’s charge. The upgrade is worth it when the existing pack drops below 80 % of its rated runtime or shows swelling. It is not suited for devices outside the listed Stonex and UniStrong models or for applications that demand a different voltage or form factor.

How it compares

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

Price $32.99
Pricier than about 57% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameKingSener
Model nameBP-3
Part numberBP-3
Power
Battery voltage rating7.4 V
Battery capacity3,400 mAh

Questions about this item

How much heat or power draw should I expect from the 7.4V 3400mAh Li-ion cells during all-day GPS surveying?

The 7.4V 3400mAh Li-ion pack runs cool under typical RTK workloads; it draws only the current the GNSS receiver requests and produces no audible noise.

What must I already own for this BP-3 replacement to power my device?

You need a Stonex S3, S8 or S9 receiver, or a UniStrong G970 RTK GNSS unit, that originally uses a BP-3 battery.

Will the BP-3 fit alongside the original battery compartment and charging contacts on my UniStrong G970?

Yes, the replacement matches the original BP-3 size and contact layout exactly, so it seats in the G970 compartment without modification.

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