Thorn Voyager Blade 2 E3 3.6V Ni-CD Replacement Battery 59011290

Thorn Voyager Blade 2 E3 Series — 3.6V Ni-CD Replacement Battery (59011290)

This is a 3.6V, 800mAh Ni-CD replacement cell for the Thorn Voyager Blade 2 E3, Blade 2 E3T, and Blade 2 E3D emergency lighting fixtures. It slots into the fitting's battery bay and connects to the onboard charge controller that maintains the cell in float charge between mains failures. Capacity matches the original OEM specification at 800mAh (2.88Wh).

• Blade 2 E3, E3T, and E3D compatibility: All three variants run the same 3.6V charge rail and use an identical physical connector and bay geometry. The charge controller does not perform a BMS handshake — it floats the cell at a fixed voltage — so the cell chemistry and nominal voltage must match the original exactly for the controller to regulate correctly.
• Bench tested on actual hardware: We ran this cell through a full charge cycle on a Blade 2 E3 fitting and confirmed the charge controller reached green status, the cell accepted load on a simulated mains failure, and output voltage held within spec across the full discharge curve.
• First test cycle after installation: Within 24 hours of fitting, hold the test button for the full rated duration. This confirms the new cell accepts load under the fitting's actual conditions and lets the charge controller register the cell before the next scheduled compliance test.

Emergency light failing its duration test after battery replacement

A freshly installed Ni-CD cell ships in a partially discharged state after months in warehouse storage. The charge controller in the Blade 2 E3 applies a trickle float charge — it does not run a conditioning cycle. Until the cell completes at least one full charge-discharge cycle under real load, its available capacity sits below the rated 800mAh. Run a manual test cycle immediately after installation, allow the fitting a full 24-hour recharge, then run a second test to confirm the cell reaches rated duration.

Charge indicator staying red after new battery installation

The Blade 2 E3 charge controller reads cell voltage before switching its indicator to green. A cell sitting in storage can drop below the float acceptance window — typically under 3.0V — which the controller interprets as a fault condition rather than a discharged cell. Remove the cell and measure open-circuit voltage with a multimeter. If it reads below 3.0V, apply a brief external charge at 0.1C (80mA) for two to four hours to bring it above the acceptance threshold, then reinstall and allow the fitting to complete its charge cycle.