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Rectangular black lithium-ion battery pack, 47 by 34 by 5.5 mm

Cameron & Co

Cameron & Co DS-CS-TMS550SL 3.7V 800mAh GPS battery

SKU CH-RR6E-JJGTF

Lithium-ion replacement battery for TomTom Start 45, 45M, 45TM, 55, 55M and 55TM models, rated 3.7 V and 800 mAh

  • TypeBattery
  • Compatible with TomTom Start 45 and 55 series
  • 7 V 800 mAh lithium-ion cell delivers 2.96 Wh
  • Slim 47.00 × 34.00 × 5.50 mm profile fits original bay
  • Replaces OEM part 6027A0090721 with 100 % compatibility
  • Brand-new Cameron Sino battery ready for immediate use

Battery for TomTom Start 45 and 55 series

The Cameron & Co DS-CS-TMS550SL is a lithium-ion replacement battery built for TomTom Start 45, 45M, 45TM, 55, 55M and 55TM navigation units. It matches the original 6027A0090721 part number and delivers 3.7 V at 800 mAh for 2.96 Wh of capacity. The cell fits the 47.00 x 34.00 x 5.50 mm bay used by those models.

Practical limits of the lithium-ion cell

The 800 mAh rating sets the energy ceiling for a single charge, so runtime on battery alone will be modest compared with permanent vehicle power. Li-ion chemistry self-discharges over weeks of storage, and capacity fades after several hundred full cycles. The pack has no built-in fuel gauge, so the host device estimates remaining time from voltage alone.

Replacing a worn or swollen original pack

This unit replaces the factory battery when it no longer holds a charge, swells, or causes unexpected shutdowns on battery power. The upgrade is worthwhile when the navigator otherwise works but cannot survive a short unplugged stop. It is not for users who need extended off-charger navigation or who want a higher-capacity cell than the original design allows.

Highlights

  • Compatible with TomTom Start 45 and 55 series
  • 7 V 800 mAh lithium-ion cell delivers 2.96 Wh
  • Slim 47.00 × 34.00 × 5.50 mm profile fits original bay
  • Replaces OEM part 6027A0090721 with 100 % compatibility
  • Brand-new Cameron Sino battery ready for immediate use

Specifications

BrandCameron Sino
ModelDS-CS-TMS550SL
TypeBattery

Questions about this item

Which capacity suits my TomTom Start 45 or Start 55?

The 800 mAh 3.7 V pack matches the original 6027A0090721 cell used in Start 45, 45M, 45TM, 55, 55M and 55TM models.

What runtime does the 2.96 Wh rating give in a sat-nav?

2.96 Wh typically powers a TomTom Start unit for several hours of active navigation before needing a recharge.

How does the Li-ion chemistry affect charging from the vehicle cradle?

The Li-ion cell accepts standard 5 V USB charging from the TomTom cradle and reaches full capacity in roughly two to three hours.

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