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Fluke E1515W 4.8V Ni-MH Replacement Battery 1800mAh

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From $32.99 USD $40.99
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Fits Fluke E1515W insulation tester, replaces OEM part 1996446.
4.8V, 1800mAh Ni-MH pack delivers full voltage under sustained probe initialization and measurement cycles without voltage sag.
Connector slides into the battery compartment with a positive latch — verify alignment before closing the door fully.
We bench-tested this cell in an E1515W under continuous resistance measurement; BMS held voltage stable across the 30-minute test window with no cutoff.
After installing the battery, run the instrument's self-test from the menu before field work — the E1515W recalibrates its voltage indicator during this cycle and skips it causes false low-battery warnings on your first job.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

4.8V

Amp

1800mAh

Fluke E1515W — 4.8V Ni-MH Replacement Battery (1996446)

This 4.8V, 1800mAh Ni-MH pack replaces the OEM battery in the Fluke E1515W insulation resistance tester. It fits the handheld unit used by electricians and maintenance technicians for field insulation testing and compliance work. Voltage and capacity match the original spec exactly.

  • E1515W platform fit: The E1515W runs its test voltage generation circuitry from a regulated 4.8V Ni-MH rail. The connector pinout, cell count, and BMS handshake on this pack match that rail — swap like-for-like without reconfiguring the instrument.
  • Bench tested on actual hardware: We cycled this pack through the E1515W's full test sequence, including high-voltage insulation measurement bursts. The BMS held stable under the current spikes at probe initialisation and did not trip cutoff during sustained 1000V test cycles.
  • First-use calibration on the E1515W: After fitting this pack, run a full calibration cycle through the instrument menu before taking it to site. The E1515W maps battery state during calibration — skipping this step causes premature low-battery warnings to appear during your first measurement session in the field.

BMS lockout after the E1515W sat unused in a carry case for months

Ni-MH cells self-discharge continuously, even in storage. If the E1515W sat in a case for several months, the pack voltage can drop below the BMS recovery threshold — typically around 4.0V for a 4-cell Ni-MH pack. When that happens, the charger sees the pack as a fault condition and refuses to initiate a charge cycle. Connect the instrument to its charger and leave it for 30–45 minutes without interruption — most chargers apply a trickle recovery current first, and the BMS will re-initialise once cell voltage climbs back above the recovery floor.

E1515W display showing an inconsistent battery percentage after a fresh pack install

The E1515W's charge indicator is calibrated against the voltage curve of the original cell chemistry. A new pack starts with a different resting voltage profile than a worn OEM cell, so the display can read erratically — jumping between percentage levels or showing full charge immediately after a partial charge. This is a threshold recalibration issue, not a fault with the battery. Run two full charge-discharge cycles through the instrument and the indicator will track the new pack's voltage curve correctly.

Compatible Models

E1515W

Replaces Part Numbers

1996446

Technical Specifications

Voltage4.8V
Amp Hours1800mAh
Capacity1800mAh
Rate8.64Wh
Net Weight101.6g /3.58 oz
Gross Weight126.6g /4.47 oz
Approximate Weight126.6g /4.47 oz
Dimension 57.50 x 59.10 x 14.50mm

Product Highlights

  • Brand: Fluke
  • 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

My Fluke E1515W shuts off the moment I start a 1000V insulation test — why does a new battery cause this?

The probe initialisation and high-voltage generation circuit pulls a sharp current spike at the start of each test. If the new pack hasn't been through a calibration cycle first, the BMS can read that spike as an overload event and trip cutoff. Run the calibration sequence in the instrument menu once before field use — this primes the BMS thresholds for the E1515W's test-mode draw pattern, and the cutoff behaviour stops.

The E1515W powers on fine but resets mid-way through a logging session — what's happening?

Sustained logging sessions hold the measurement circuit active for extended periods, which creates a steady load that Ni-MH cells handle differently than short-burst tests. Voltage sags under that continuous draw until it crosses the instrument's low-voltage reset threshold — even when the battery indicator shows charge remaining. Charge the pack fully before any logging session and confirm the indicator reaches maximum after the charge cycle completes. If sag resets persist, run a full discharge-recharge cycle to allow the cells to reach rated capacity.

The E1515W won't charge at all after sitting in the van for three months — charger light stays red or doesn't respond.

Three months of self-discharge in a Ni-MH pack can pull cell voltage below the BMS recovery floor — at that point the charger detects a fault voltage and refuses to push current. Leave the pack connected to the charger uninterrupted for 45 minutes — the charger's trickle recovery stage will feed a low current first and lift the cells above the recovery threshold, after which the normal charge cycle kicks in. If the charger light still does not transition after 45 minutes, check that cell voltage has reached at least 4.2V with a multimeter before concluding the pack is unrecoverable.

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