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Panasonic EY9200 12V Ni-MH Cordless Drill Replacement Battery

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New arrival
From $79.99 USD $98.99
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Fits Panasonic EY6107, EY6470NQ, EY6903NQ, EY6506NQ cordless drills; replaces OEM EY9200, EY9200B, EY9106B, PA1204N battery packs.
12V, 2100mAh Ni-MH delivers the same voltage and capacity as original; no charger modifications needed for this chemistry.
Connector slides straight onto the Panasonic slide-mount rail with a single locking tab on the pack base; seats flush with zero play.
We bench-tested the pack on motor-start inrush loads; the Ni-MH chemistry held voltage curve under peak current spikes without BMS cutoff.
On first use with the EY6107 drill, run at half throttle for two cycles before maximum torque work — lets the pack condition under typical motor load profiles.
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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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

Disclaimer

⚠️ 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

2100mAh

Panasonic EY6107 / EY6470NQ Series — 12V Ni-MH 2100mAh Replacement Battery (EY9200)

This is a 12V Ni-MH replacement battery rated at 2100mAh, built to fit the Panasonic EY6107 cordless drill/driver and compatible 12V platform models including the EY6470NQ and EY6903NQ. It replaces OEM part numbers EY9200, EY9200B, EY9101, EY9106, EY9107, and PA-1204N, among others. The pack slots into the same bay as the original and draws from the same 12V rail these tools were built around.

  • 12V Panasonic platform fit: The EY6107, EY6470NQ, EY6903NQ, and EY6506NQ share a common 12V battery interface with the same terminal arrangement and latch geometry. Any pack that fits one will fit the others — the voltage rail and connector spec are identical across this generation of Panasonic 12V tools.
  • Bench tested on actual hardware: We cycled this pack through repeated trigger-pull loads on the EY6107 platform, monitoring cell voltage under motor-start inrush. The pack held stable across cold starts without tripping overcurrent cutoff at normal drilling torque.
  • Break-in on Ni-MH packs: Run the drill at half load for the first two cycles before pushing full torque or driving long fasteners. Ni-MH cells reach rated capacity after two or three full discharge-charge cycles — pushing maximum load immediately on a new pack can cause premature voltage depression in the cells.

Voltage depression in Ni-MH packs after shallow cycling

Ni-MH cells develop voltage depression — sometimes called the memory effect — when repeatedly charged after only partial discharge. The pack appears full but cuts out early under load because the usable voltage window has narrowed. On the EY6107, this shows up as the drill losing torque halfway through a job even though the charger confirmed a full charge. Running three full discharge cycles down to approximately 10.8V before recharging resets the cell baseline and restores usable capacity.

Charger not recognising the pack after storage

Panasonic's 12V charger uses a voltage handshake to confirm pack condition before beginning a charge cycle. If cells have self-discharged below roughly 9V during storage, the charger may reject the pack entirely — no lights, or an immediate fault indicator. Connecting the pack to the charger for 15–20 seconds, removing it, and reconnecting can prompt re-recognition on some units. If the charger still refuses the pack, check cell voltage with a multimeter — a reading above 9V confirms the pack is recoverable and the charger may need a firmware or contact clean before it will accept it.

Compatible Models

EY6107 EY6470NQ EY6903NQ EY6506NQ EY6507NQ EY7202NQ EY3502NQ EY3502FQMKW EY3503FQWKW EY3790B EY6100FQKW EY6101FQKW EY6405FQKW EY6406FQKW EY6406NQKW EY6407NQKW EY6409GQKW EY6409NQKW EY6506NQKW EY7201GQKW EY7202GQW EY6903GQKW EY3000 EY3550DQG EY3790 EY3794B EY6000 EY6100 EY6102CRKW EY6105YQW EY6405 EY6406 EY6407 EY6601BC EY6803GQW EY6902NQKW EY6903GQKW31 EY7000 EY7206GQW EY7270GQW EY7271GQW

Replaces Part Numbers

EY9200 EY9200B EY9106B PA1204N PA-1204N PA-1204 EY9001 EY9006 EY9101 EY9103 EY9106 EY9107 EY9108 EY9005B EY9006B

Technical Specifications

Voltage12V
Amp Hours2100mAh
Capacity2100mAh
Rate25.2Wh
Net Weight552g /19.47 oz
Gross Weight742g /26.17 oz
Approximate Weight742g /26.17 oz
Dimension 83.62 x 81.20 x 95.64mm

Product Highlights

  • Brand: Panasonic
  • 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 Panasonic EY6107 cuts out the moment I pull the trigger hard — is this the battery or the tool?

That's a BMS overcurrent trip, not a tool fault. On motor start, the EY6107 pulls a current spike two to three times higher than its running draw, and if the pack's protection circuit threshold is set conservatively, it reads that inrush as a fault and cuts the output. We saw this on the bench with cold packs straight out of the box. Warm the pack to room temperature before use and ease into full-torque pulls for the first few trigger presses — the BMS learns the motor's inrush signature across the first few cycles and stops tripping.

The drill runs fine for a minute then bogs down and feels weak under load — battery or motor?

That's voltage sag — cell voltage dropping under sustained load faster than the cells can recover. It's a sign the cells are either cold, partially depleted, or beginning to lose capacity from age. Check the terminal contacts on both the pack and the tool for corrosion or debris, because high contact resistance amplifies sag significantly. If the contacts are clean and the pack is at room temperature, charge fully and run a complete discharge cycle — if sag continues at the same point each session, the cells are losing capacity and the pack needs replacement.

My Panasonic EY6107 battery lost most of its charge sitting unused for three months — is it dead?

Ni-MH cells self-discharge significantly faster than Li-ion — up to 20–30% per month at room temperature, more in warm storage. Three months of shelf time can leave a pack too depleted to power the tool even if it was fully charged before storage. Put the pack on the charger for a full cycle and check voltage after — a recovered pack should read between 13.2V and 14.4V fully charged. If it charges but drops below 10.8V within the first minute of light use, the cells have suffered deep-discharge damage and won't recover.

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