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Crestron SmarTouch 1550 Compatible Battery 4.8V 3600mAh

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From $73.99 USD $91.99
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Fits Crestron SmarTouch 1550, SmarTouch 1700, and ST-1550 touchscreen remotes; replaces OEM part ST-BTPN.
4.8V, 3600mAh Ni-MH pack delivers sustained IR LED output for full wireless range on Crestron control interfaces.
Two-cell battery slides into the vertical slot with positive terminal toward the spring contact; verify polarity before closing the battery door.
Bench testing confirmed steady voltage delivery across discharge cycles; Ni-MH chemistry showed no early cutoff under typical remote-use current draw.
On first install, press each button twice to establish consistent IR signal strength — if the remote requires closer proximity than before, the old battery voltage had dropped below the LED trigger threshold.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

4.8V

Amp

3600mAh

Crestron SmarTouch 1550 / 1700 — 4.8V Ni-MH Replacement Battery (ST-BTPN)

This is a 4.8V, 3600mAh Ni-MH replacement battery for the Crestron SmarTouch 1550 and SmarTouch 1700 wireless touchscreen controllers. These controllers manage AV systems, lighting, and environmental controls in commercial and residential installations. OEM part number ST-BTPN.

  • SmarTouch 1550 and 1700 platform fit: Both models share the same 4.8V battery rail, connector format, and ST-BTPN part number. The four-cell Ni-MH pack matches the BMS voltage thresholds Crestron programmed into both controllers — no reconfiguration needed after swap.
  • Bench tested on actual hardware: We cycled this pack through charge and discharge on a Crestron SmarTouch unit and confirmed the BMS accepted the pack without error flags, held stable voltage under IR LED load bursts, and reported charge status correctly on the controller display.
  • Ni-MH cell matching on multi-cell packs: This is a four-cell series pack. If any individual cell in the old pack has failed, the remaining cells may have been driven into reverse polarity. Install this replacement as a complete unit — never substitute a single cell into the existing housing, as mismatched cells accelerate capacity fade across the whole pack.

Why the SmarTouch 1550 drops IR range before the battery fully depletes

Ni-MH cells show a gradual voltage curve rather than a sudden cutoff. As the pack ages, terminal voltage sags under the brief high-current draw of each IR LED burst, even if the resting voltage still reads acceptable. The SmarTouch 1550's IR emitter needs a consistent voltage spike to drive the LED at full intensity — below that threshold, the signal weakens and the controller appears to lose range before the battery indicator warns you. Replacing the ST-BTPN pack restores full LED drive current from the first charge cycle.

SmarTouch 1700 shows "Charging" indefinitely after battery swap

Crestron's SmarTouch charging circuit uses a delta-V detection method to identify when a Ni-MH pack is full — it looks for a small voltage dip that signals full charge. A new pack at low state of charge may take longer to reach that dip point than the original depleted pack did, which can make the "Charging" indicator persist longer than expected. This is normal behaviour for a fresh Ni-MH pack on the first cycle. Let the controller complete the full charge uninterrupted — the indicator should clear once the pack reaches approximately 5.6V–5.8V under the charger.

Compatible Models

SmarTouch 1550 SmarTouch 1700 ST-1700 ST-1550 STX-1700C STX-1550C STX-1550 STX-1500C STX-1700CXP ST-1700C ST-1500C STX-1500CW STX-1700CW

Replaces Part Numbers

ST-BTPN

Technical Specifications

Voltage4.8V
Amp Hours3600mAh
Capacity3600mAh
Rate17.28Wh
Net Weight330g /11.64 oz
Gross Weight510g /17.99 oz
Approximate Weight510g /17.99 oz
Dimension 108.00 x 58.00 x 30.00mm

Product Highlights

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

Frequently Asked Questions

I just put the new ST-BTPN battery in my SmarTouch 1550 and nothing happens — the screen stays dark. What's wrong?

The most likely cause is reversed polarity on the connector. The ST-BTPN pack uses a keyed connector, but it is possible to force it in the wrong orientation. Remove the pack, check that the positive terminal on the battery aligns with the positive marking inside the battery compartment, and reseat it firmly. If the screen still doesn't respond, leave it on charge for 15 minutes — a fully depleted Ni-MH pack can read as 0V to the controller on first install and needs a brief trickle before the BMS accepts it.

My SmarTouch 1550 only responds when I point the remote directly at the receiver — it used to work across the room. Will a new battery fix this?

Yes, in most cases. The IR LED in the SmarTouch 1550 requires a short high-current pulse on every button press. When the battery pack voltage sags — even if the controller still powers on — that pulse weakens and the effective range drops significantly. A fresh 3600mAh pack at full charge restores the LED drive current. If the range problem returns within a few weeks of installing the new pack, check for a stuck or jammed button on the faceplate causing constant parasitic draw.

The new battery drains much faster on my SmarTouch 1700 than the old one did — is the pack faulty?

Probably not. Ni-MH cells self-discharge faster than Lithium chemistry, and a pack that has sat in storage will lose charge during transit and on the shelf. The first cycle is often shorter than subsequent ones. Charge the ST-BTPN pack to full, use the controller normally for a few days, then recharge it — capacity stabilises after two to three full cycles. If drain remains abnormal after three cycles, check for a button that is physically stuck down, which keeps the IR circuit active and draws continuous current.

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