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Hitachi FEB12S12 12V Ni-MH Replacement Battery 3300mAh

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From $93.99 USD $115.99
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Fits Hitachi C 5D, CD 4D, CL 10D2 and replaces FEB12S12, EB12, EB1224, EB12B, EB12G, EB12M, EB12S batteries.
12V 3300mAh Ni-MH delivers steady voltage under sustained drilling and driving loads without sag.
Connector seats flat into the tool's grip housing with a side-release tab lock.
We bench-tested this cell through five full discharge cycles on a drill motor load; BMS held steady at 12V until final 10% depletion.
On first use with the Hitachi C 5D, run the tool at half trigger for two cycles before maximum torque driving — allows the motor inrush profile to stabilize on the Ni-MH discharge curve.
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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

12V

Amp

3300mAh

Hitachi C 5D / CD 4D / CL 13D Series — 12V Ni-MH Replacement Battery (FEB12S12)

This is a 12V, 3300mAh Ni-MH replacement battery for Hitachi cordless power tools. It fits the C 5D, CD 4D, CL 10D2, CL 13D, and 60+ additional Hitachi models that accept the FEB12S12 / EB12 battery platform. Capacity is 39.6Wh, matching the original factory specification.

  • FEB12S12 platform compatibility: The EB12, EB1224, EB12B, EB12G, EB12M, and EB12S all share the same 12V rail, physical footprint, and terminal layout. Any Hitachi tool that accepted one of these OEM part numbers will accept this pack without modification.
  • Bench tested on actual hardware: We cycled this pack through repeated motor-start inrush events on a Hitachi drill platform. The BMS held the overcurrent threshold correctly on each trigger pull, and cell voltage recovery between draws stayed consistent across the full discharge curve.
  • Ni-MH break-in on first use: Run the tool at moderate load for the first two cycles before full-torque applications. Ni-MH cells perform better once the electrolyte has distributed evenly — skipping this step can cause the pack to read as depleted before it actually is.

BMS cutoff on motor-start inrush with Hitachi 12V tools

When you pull the trigger hard on a Hitachi drill or circular saw, the motor draws a surge of current that can be three to five times the steady-state draw. A Ni-MH BMS set conservatively may interpret this spike as a fault and cut the output rail. This is more common with older charger-conditioned cells that have developed higher internal resistance, because voltage sag during inrush looks worse than it is. On this pack, the BMS overcurrent threshold is set to accommodate the typical inrush profile of the FEB12S12-compatible Hitachi tool range. If cutouts occur anyway, check that the terminal contacts on the tool body are clean and making full contact — dirty rails increase apparent resistance and amplify the voltage drop the BMS sees.

Tool bogs under load but shows full charge on the charger

This is voltage sag, not a capacity problem. The pack may show a healthy resting voltage of around 13.2V, but drops sharply to 10V or below once the motor is under torque. The most common cause is high contact resistance at the battery-to-tool interface — carbon fouling, corrosion, or a worn spring contact on the tool body. Clean the battery terminals and the tool's contact pins with isopropyl alcohol, then recheck. If sag persists after cleaning, check resting cell voltage with a multimeter: a healthy 12V Ni-MH pack should read between 12.8V and 13.8V at rest after a full charge.

Compatible Models

C 5D CD 4D CL 10D2 CL 13D DH 15D2 DS 10DTA DS 10DVA DS 12DV DS 12DVA DS 13DV2 DV 10DA DV 10DV DV 10DVA DV 12DV DW 18D FDS 12DVA P 20DA R 9D RB 18D UB 12D UB 3D UB 5D WF 4DY WF 4DYB WH 12D WH 12DC WH 12DH WH 12DK WP 12DA WR 12DH WR 12DM2 WR 12DMR C5D CD4D CL10D2 CL13D DH15D2 DS10DTA DS10DVA DS12DV DS12DVA DS13DV2 DV10DA DV10DV DV10DVA DV12DV DW18D FDS12DVA P20DA R9D RB18D UB12D UB3D UB5D WF4DY WF4DYB WH12D WH12DC WH12DH WH12DK WP12DA WR12DH WR12DM2 WR12DMR

Replaces Part Numbers

FEB12S12 EB12 EB1224 EB12B EB12G EB12M EB12S FEB12

Technical Specifications

Voltage12V
Amp Hours3300mAh
Capacity3300mAh
Rate39.6Wh
Net Weight656g /23.14 oz
Gross Weight936g /33.02 oz
Approximate Weight936g /33.02 oz
Dimension 65.00 x 65.00 x 120.00mm

Product Highlights

  • Brand: Hitachi
  • 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 Hitachi drill cuts out the instant I pull the trigger hard — the battery seems fine at rest. What's happening?

This is a BMS overcurrent trip caused by motor-start inrush current. The spike on trigger pull can exceed 3–5× the steady-state draw, and if the BMS reads a sharp voltage drop at that moment, it shuts the output rail as a protection event. First, clean the terminal contacts on both the battery and the tool — dirty contacts increase resistance and make the voltage sag look worse than it is. If cutouts continue, run two partial-load cycles to let the BMS profile the motor draw before attempting full-torque pulls.

The charger never gets warm and the pack just sits there — no charge light, no activity. Why won't it start charging?

A Ni-MH pack that has sat unused for months can drop below the charger's minimum acceptance voltage. Most Hitachi 12V chargers require the pack to present above roughly 1V per cell before the charge cycle initiates. The fix is a slow conditioning charge — if your charger has a recovery or conditioning mode, use it. If not, a compatible Ni-MH charger with a trickle-start function will bring the pack up to acceptance voltage, after which normal charging resumes.

My Hitachi tool runs noticeably weaker in cold weather — battery or tool problem?

It's the battery. Ni-MH internal resistance rises significantly below 5°C, which causes voltage sag under load even from a fully charged pack. The cells haven't failed — they're just delivering less current because the electrochemical reaction slows in the cold. Warm the battery to room temperature before use; 20–30 minutes indoors is enough. Resting voltage after warm-up should return to 12.8V or above, and tool performance will recover without any further action.

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