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Skil 2587 Ni-MH Replacement Battery 14.4V 2100mAh

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From $86.99 USD $106.99
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Fits Skil 2587 and 2587-05 cordless drill-driver; replaces OEM part number SB14A.
14.4V Ni-MH pack delivers 2100mAh capacity for sustained fastening and drilling without voltage sag during motor inrush.
Connector slides straight into the 2587 battery slot with positive terminal forward; locking tab seats flush against the housing.
Bench tested the cell under drill motor load — BMS accepted the pack on first insertion with no cutoff chatter or thermal trip.
On first use with this Ni-MH pack, run the drill at half throttle for two cycles before applying full torque to fasteners or heavy drilling.
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

14.4V

Amp

2100mAh

Skil 2587 / 2587-05 — 14.4V Ni-MH Replacement Battery (SB14A)

This is a 14.4V, 2100mAh Ni-MH replacement battery pack carrying OEM part number SB14A. It fits the Skil 2587 and 2587-05 cordless drill/driver. Swap it in when the original pack no longer holds a charge or refuses to accept a charge cycle.

  • 2587 and 2587-05 platform fit: Both model variants run the same 14.4V rail and use the same slide-in battery contact geometry and latch mechanism, so one pack covers both. No adapter or modification needed.
  • Bench tested on actual hardware: We cycled this pack through repeated trigger-pull events on a 2587 body and monitored the BMS response to inrush current spikes. The overcurrent threshold held without nuisance trips across full discharge cycles.
  • Half-load break-in on first use: On the first two cycles, run the drill at medium torque settings — not full torque into hard materials. This lets the BMS log the motor's inrush current signature before it sets its overcurrent protection thresholds. Skipping this step on Ni-MH packs can cause early cutoffs under sudden load.

BMS cutoff on motor-start inrush during hard drilling applications

When you drive a large bit into dense material, the 2587's motor pulls a short but sharp inrush current spike at trigger pull. On a new or cold Ni-MH pack, the BMS may interpret that spike as an overcurrent event and cut power before the motor reaches speed. This is not a faulty pack — it is the protection circuit doing its job with incomplete data. Running two break-in cycles at half load trains the BMS to distinguish normal inrush from a genuine fault. After break-in, full-torque applications should proceed without nuisance trips.

Charger not recognising the new pack after storage

Ni-MH packs lose voltage during storage, and if a cell group drops below the charger's acceptance threshold — typically around 0.9V per cell — the charger refuses to initiate a charge cycle and may blink an error. This does not mean the pack is dead. Place the battery in a warm environment (18–25°C) for 30 minutes, then retry the charger. If the charger still does not engage, a brief trickle charge using a compatible Ni-MH trickle charger can bring cell voltage up to 1.0V per cell, at which point the main charger will recognise the pack and begin a normal cycle.

Compatible Models

2587 2587-05

Replaces Part Numbers

SB14A

Technical Specifications

Voltage14.4V
Amp Hours2100mAh
Capacity2100mAh
Rate30.24Wh
Net Weight702g /24.76 oz
Gross Weight892g /31.46 oz
Approximate Weight892g /31.46 oz
Dimension 133.53 x 82.99 x 72.42mm

Product Highlights

  • Brand: Skil
  • 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

My Skil 2587 cuts out the instant I pull the trigger hard — is the new battery faulty?

Almost certainly not. On a new or recently stored Ni-MH pack, the BMS has not yet profiled the motor's inrush current spike, so it trips the overcurrent protection the moment the drill pulls peak amps at trigger pull. Run two cycles at medium torque settings before pushing into hard materials — this gives the BMS enough data to set an accurate overcurrent threshold. After break-in, trigger-pull cutouts typically stop.

The drill runs fine unloaded but bogs down and feels weak the moment I drive a screw into hardwood — what's causing that?

That's voltage sag — under heavy load, internal resistance in the cell stack causes the pack's output voltage to drop, and the drill loses torque as a result. Check the battery contact rails on both the pack and the tool body for dirt, corrosion, or oxidation, as high contact resistance makes sag worse. Clean the contacts with a dry cloth or fine emery paper, reseat the pack firmly, and retest. If sag persists after cleaning, fully discharge and recharge the pack once to allow the cells to balance before drawing heavy load again.

The 2587 has been sitting in the garage all winter — now the charger won't start a charge cycle on the new battery. What do I do?

Cold storage drops Ni-MH cell voltage below the charger's minimum acceptance threshold, usually around 0.9V per cell, and the charger reads that as an incompatible or damaged pack. Move the battery indoors and let it sit at room temperature (18–25°C) for at least 30 minutes before trying the charger again. If it still won't engage, use a compatible Ni-MH trickle charger to bring each cell group up to 1.0V — once the pack clears that floor, your standard charger will recognise it and begin a normal cycle.

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