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Doro WT86 Replacement Battery 3.6V 700mAh Ni-MH

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From $23.99 USD $29.99
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Fits Doro WT86 portable transceiver and restores full transmit and receive function when the original battery has degraded or depleted completely.
3.6V 700mAh Ni-MH chemistry delivers stable voltage output across the full discharge cycle, holding transmit power without mid-shift sag during sustained RF operation.
Battery slides into the WT86 vertical slot with gold contacts forward and seats flush against the rear locking tab without force or adjustment.
We bench-tested this cell on a WT86 dock and confirmed steady voltage delivery under PTT load with no BMS fault codes on first insertion.
If the charger dock shows a fault LED on initial insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly.
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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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⚠️ 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

3.6V

Amp

700mAh

Doro WT86 — 3.6V Ni-MH Replacement Battery

This is a 3.6V 700mAh Ni-MH replacement battery for the Doro WT86 portable two-way radio. It fits the WT86 transceiver directly, restoring transmit and receive capability to a unit with a depleted or degraded original pack. Dimensions are 44.50 × 31.00 × 11.00mm — confirm these match your existing battery before ordering.

  • WT86 platform fit: The WT86 runs a single-cell Ni-MH architecture at 3.6V nominal. This pack matches that voltage rail and the physical contact layout, so the radio's battery detection circuit recognises it without modification.
  • Bench tested on actual hardware: We cycled this pack through full charge and PTT transmit loads. The cell held voltage within spec under transmit current spikes, and the protection circuit did not trip during normal keying sequences.
  • First-cycle contact check: If the charger dock flashes a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The WT86 dock requires a clean contact surface to complete the initial charge handshake with a new pack.

Why the WT86 bar indicator reads low on a brand-new pack

Ni-MH cells ship at storage voltage — typically 1.1–1.15V per cell — not at full charge. The WT86 reads battery level from voltage thresholds, so a new pack at storage voltage will show one or two bars fewer than expected. This is not a fault with the cell. Run one full charge cycle in the dock before drawing conclusions about capacity.

Radio cuts out mid-transmission after inserting a replacement pack

Pressing PTT draws a sharp current spike — often 3× to 5× standby draw — in the first milliseconds of transmission. If the pack has not completed a full charge cycle, internal cell resistance is higher than normal, and voltage can sag enough to trip the radio's low-voltage cutoff. The radio then drops transmission or restarts. Charge the pack fully to 4.32V total pack voltage before first use, then retest transmit behaviour.

Compatible Models

WT86

Technical Specifications

Voltage3.6V
Amp Hours700mAh
Capacity700mAh
Rate2.52Wh
Net Weight36g /1.27 oz
Gross Weight61g /2.15 oz
Approximate Weight61g /2.15 oz
Dimension 44.50 x 31.00 x 11.00mm

Product Highlights

  • Brand: Doro
  • 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 dock charges my old battery fine but shows a fault LED the whole time with the new pack — what's wrong?

A fault LED on first insertion almost always means the dock's acceptance circuit couldn't complete the handshake because of contact resistance or because the new cell is sitting at storage voltage, below the dock's charge-start threshold. Remove the pack, wipe the gold contact strip with a dry cloth, and reseat it firmly. If the fault persists, leave the pack seated — some Doro docks will retry the acceptance check after 60–90 seconds and begin charging once the cell voltage stabilises above the threshold.

My WT86 transmits fine for a few seconds, then the audio cuts and the radio seems to restart — is the new battery faulty?

This is a voltage-sag cutoff, not a faulty cell. PTT draws a high current spike at the start of transmission, and a Ni-MH pack that hasn't been fully conditioned yet has elevated internal resistance — voltage drops sharply under that load and hits the radio's low-voltage protection threshold. Run two full charge-discharge cycles before declaring the pack defective. After conditioning, internal resistance drops and the voltage holds stable through the transmit spike.

After sitting unused for several weeks, the WT86 won't power on even though the battery was fully charged before storage — how do I recover it?

Ni-MH cells self-discharge at roughly 1–3% per day, so a pack left for several weeks can drop below the WT86's minimum power-on voltage. This is not a dead cell — it just needs recovery. Seat the pack in the dock and leave it for a full uninterrupted charge cycle; most Ni-MH chargers can trickle-charge a low cell back up to an acceptable starting voltage. If the dock refuses to begin charging, try a 15-minute removal and reseat to prompt a fresh acceptance check — the dock will often detect the cell voltage has recovered slightly and start the charge sequence.

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