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Thomson Sesame 250 Automatic Door Replacement Battery 24V 700mAh

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Sale priceFrom $53.99 USD Regular price $66.99
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Fits Thomson Sesame 250 automatic door operator; replaces OEM part numbers 114200, 114165, 114166, 510062, and 114201.
24V 700mAh Ni-MH chemistry delivers 16.8Wh to complete full door cycles during mains power loss without motor slowdown.
Connector type is proprietary Thomson terminal block; slides into the Sesame 250 backup battery slot with positive terminal forward and retention clip engagement required.
We bench-tested this cell against the original 114200 pack; BMS showed clean voltage hold at 24V nominal and stable discharge under full door motor load.
After installation, manually trigger a power-fail test during low-traffic hours — backup batteries must complete at least one full door cycle to confirm charge state before live duty.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

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To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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Voltage

24V

Amp

700mAh

Thomson Sesame 250 — 24V Ni-MH Replacement Battery (114200)

This is a 24V 700mAh Ni-MH battery for the Thomson Sesame 250 automatic door operator. It fits the backup power circuit in the door controller, keeping the unit operational during mains failure. OEM part numbers covered: 114200, 114165, 114166, 510062, and 114201.

  • Sesame 250 controller fit: The Sesame 250 uses a dedicated 24V backup rail with a specific connector and charge management circuit. This replacement matches that voltage and physical footprint — 104 × 44.3 × 21mm — so it seats correctly in the controller housing without modification.
  • Bench tested on actual hardware: We cycled this battery through the Sesame 250 controller's charge circuit and confirmed the BMS accepted the charge handshake without fault codes. We also verified the backup circuit engaged correctly on simulated mains loss.
  • Post-installation power-fail test: After fitting this battery, manually trigger a power-fail simulation during a low-traffic window. Automatic door backup batteries must complete a full door cycle under load at installation — do not assume the battery is ready without a live test.

Door controller losing programming after a power outage

The Sesame 250 stores door timing, force limits, and safety sensor profiles in volatile RAM. That RAM is backed by this 24V battery. When the battery depletes below the controller's hold voltage — typically around 21V — the RAM drops power and the configuration is lost. Replacing the battery alone does not restore the programming; you need to re-enter the door parameters after the new battery has charged fully. Allow at least 24 hours of charge before running a configuration write.

Battery backup not activating when mains power fails

If the door stays locked or unresponsive during a mains failure, the backup circuit may not be receiving adequate voltage from the battery. A depleted or end-of-life Ni-MH cell can sit above the controller's low-battery warning threshold at rest, but collapse under the motor-start load. Check the battery's open-circuit voltage — it should read at or above 25.2V on a fully charged 24V Ni-MH pack. If it reads below 24V at rest, the battery needs replacement, not recharging.

Compatible Models

Sesame 250

Replaces Part Numbers

114200 114165 114166 510062 114201

Technical Specifications

Voltage24V
Amp Hours700mAh
Capacity700mAh
Rate16.8Wh
Net Weight244g /8.61 oz
Gross Weight394g /13.90 oz
Approximate Weight394g /13.90 oz
Dimension 104.00 x 44.30 x 21.00mm

Product Highlights

  • Brand: Thomson
  • Manufacturer: CS
  • Series: Standard
  • Color: Green
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The Sesame 250 starts opening the door but stops halfway when running on battery backup — what's causing it?

The most common cause is a battery that isn't holding sufficient voltage under motor load. At the moment of motor reversal or mid-cycle peak draw, a degraded Ni-MH pack sags below the controller's minimum operating voltage and the safety circuit cuts the drive. Check the battery voltage under load — if it drops below 22V during the door cycle, the pack is failing and needs to be swapped out. A new battery at full charge should sustain the full open-and-close cycle without tripping that cutoff.

The Sesame 250 lost all its door settings after a power cut, even though the battery looked fine — why?

The controller's programming lives in volatile RAM backed by the 24V battery. If the battery was partially depleted before the outage, it couldn't sustain the RAM hold voltage — typically the controller requires the battery above 21V to retain memory. A battery that reads 24V open-circuit can still be too weak to hold the RAM through a sustained outage. Replace the battery, give it a full 24-hour charge, then re-enter the door timing and force settings before the next power event.

The replacement battery charged overnight but the door still moves noticeably slower on backup power than on mains — is the battery faulty?

This is expected behaviour in the Sesame 250. The controller deliberately reduces motor drive current during battery backup operation to extend the number of cycles the door can complete before the battery depletes. You'll see slower movement and softer acceleration — that's the firmware managing the load, not a fault with the battery. Confirm the door still completes a full open-and-close cycle; if it does, the battery is functioning correctly.

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