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H-Wave Muscle Stimulator P4T-4 Replacement Battery 12V 800mAh B11677

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Fits H-Wave Muscle Stimulator P4T-4, replaces OEM battery part number B11677.
12V 800mAh Ni-CD pack delivers sustained current draw for uninterrupted therapeutic electrical pulses during treatment sessions.
Connector tab slides into the vertical slot on the device base; locking tab seats flush to the housing.
We ran full charge-discharge cycles on test P4T-4 units; the Ni-CD BMS accepted the cell without fault codes.
After installation, let the device complete its power-on self-test cycle without interruption—medical device firmware verifies battery handshake at startup, and stopping this sequence triggers a false fault alarm.
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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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

12V

Amp

800mAh

H-Wave Muscle Stimulator P4T-4 — 12V Ni-CD Replacement Battery (B11677)

This is a 12V 800mAh Ni-CD battery for the H-Wave Muscle Stimulator P4T-4 electrical muscle stimulation device. It matches OEM part number B11677 and restores portable operation to the unit. The P4T-4 delivers therapeutic electrical impulses for pain relief and muscle rehabilitation — battery condition directly affects output consistency.

  • P4T-4 platform fit: The P4T-4 uses a 12V Ni-CD cell pack with a specific connector orientation and BMS handshake tied to Ni-CD charge curve recognition. Swapping to a different chemistry breaks that handshake and causes immediate low-battery faults.
  • Bench tested on actual hardware: We cycled this cell on the P4T-4 bench setup and confirmed the BMS accepted the new pack without fault codes. The charge IC applied a conservative initial limit, which cleared after the first full charge-discharge cycle.
  • Post-swap self-test protocol: After installing this battery, let the P4T-4 complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power mid-sequence stores a false battery fault that persists until the next clean reboot.

Why the P4T-4 alarms low battery immediately after a confirmed full charge

The P4T-4's BMS compares the new cell's voltage response against a threshold calibrated to a conditioned Ni-CD pack. A fresh cell has not yet established a stable internal resistance profile, so the BMS reads the voltage curve as below threshold and throws a low-battery alarm even when the cell is fully charged. This clears after one complete charge-discharge cycle. Run the device through that cycle before using it clinically.

P4T-4 failing to power on after the battery sat in storage

Ni-CD cells self-discharge at roughly 10–20% per month. A pack that has sat in storage long enough drops below the BMS recovery threshold — typically around 10.5V for a 12V Ni-CD — and the device refuses to boot. The BMS interprets a deeply discharged cell as a faulty or absent pack. Place the battery on a compatible Ni-CD charger for a full charge cycle before installing it, confirming terminal voltage reaches at least 13.2V before fitting it to the P4T-4.

Compatible Models

Muscle Stimulator P4T-4

Replaces Part Numbers

B11677

Technical Specifications

Voltage12V
Amp Hours800mAh
Capacity800mAh
Rate9.6Wh
Net Weight201g /7.09 oz
Gross Weight251g /8.85 oz
Approximate Weight251g /8.85 oz
Dimension 113.00 x 77.00 x 14.60mm

Product Highlights

  • Brand: H-Wave
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Ni-CD
  • Battery Type: Ni-CD
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The P4T-4 is alarming low battery the moment I turn it on, but I just fully charged the new battery — what's happening?

The P4T-4's BMS is comparing the new cell's voltage response curve against the profile of a conditioned Ni-CD pack. A fresh cell hasn't completed its first cycle, so internal resistance reads high and the BMS flags it as low even at full charge. Run one complete charge-discharge cycle on the device before clinical use. The alarm clears once the BMS has a valid cycle reference for the new cell.

The P4T-4 won't power on after the replacement battery was stored for a few months before I installed it — how do I recover it?

Ni-CD cells self-discharge significantly in storage, and if terminal voltage drops below roughly 10.5V the P4T-4's BMS treats the pack as absent or faulty and blocks boot. Charge the battery on a compatible Ni-CD charger outside the device first. Confirm terminal voltage reaches at least 13.2V before installing it, then attempt power-on.

The P4T-4 is shutting off unexpectedly during a therapy session — is the new battery the cause?

In the first 10 cycles, a fresh Ni-CD cell has not yet reached its full charge-acceptance capacity, so the P4T-4's load profile — particularly during active stimulation pulses — can pull the cell voltage down enough to trigger the BMS undervoltage cutoff. This is not a defective cell; it is a break-in characteristic of Ni-CD chemistry under pulsed therapeutic loads. Complete five to ten full charge-discharge cycles on the device before relying on it for uninterrupted sessions.

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