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Small rectangular lithium battery with smooth silver finish and thin profile

Estry

Estry Replacement Battery for Astrostart RSS 5225 3.7V 120mAh

SKU CH-2EN0-TJKTA

Replacement lithium battery for Astrostart RSS 5225 remote, 3.7V 120mAh with overcharge and short-circuit protection

  • Battery pack size1-pack
  • Battery typeLithium
  • Battery capacity120 mAh
  • Battery voltage rating3.7
  • Product typeBatteries
  • Exact-fit replacement for Astrostart RSS 5225
  • 120 mAh lithium cell delivers reliable runtime
  • Built-in overcharge and short-circuit protection
  • Certified to ISO 9001, RoHS, CE, UN 38.3, MSDS
  • Compact 24.7 × 20.3 × 3.7 mm, 28.2 g design

Exact replacement for Astrostart RSS 5225

This lithium cell matches the original 3.7V 120mAh specification for the Astrostart RSS 5225 remote. It delivers 0.44Wh in a single pack and includes overcharge, over-discharge, over-voltage and short-circuit protection. The 24.7 x 20.3 x 3.7mm form factor fits the factory compartment without modification.

Replaces an exhausted or swollen OEM cell

When the original battery no longer holds a charge or shows physical swelling, this unit restores the remote’s rated runtime. The jump is worth it if the transmitter still functions but the power source has degraded beyond reliable use. Buyers who need a different voltage, a higher capacity or a multi-pack configuration will not be served by this model.

Handles daily remote-start cycles

The 120mAh capacity supports typical lock, unlock and remote-start sequences between charges. It runs out when the transmitter is left active for extended periods or when the cell ages past its usable cycle count. The 28.2g weight and certified ISO9001, RoHS, CE, UN38.3 and MSDS compliance confirm baseline safety and quality.

How it compares

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

Price $10.99
Typical for this category: the median of 10,440 items is $10.99.

Specifications

Product
Brand nameAstrostart
Product typeBatteries
Power
Battery typeLithium
Battery capacity120 mAh
Battery voltage rating3.7
In the box
Battery pack size1-pack

Questions about this item

What are the exact dimensions of this replacement battery for the Astrostart RSS 5225?

The cell measures 24.7 by 20.3 by 3.7 mm and weighs 28.2 g, so verify the compartment matches these figures before ordering.

How is the battery installed, and what common mistake should be avoided?

Disconnect power, remove the old pack, match the connector polarity exactly, then seat the new unit; reversing the connector is the step most often done wrong.

When will this 3.7 V 120 mAh lithium cell need replacing?

Capacity fades after several hundred charge cycles; replace it when run-time drops noticeably or the pack no longer holds a full charge.

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