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Yashica 8KX-1 Compatible Battery 6V 4200mAh Ni-MH

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From $50.99 USD $62.99
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Fits Yashica 8KX-1 and 50+ compatible models, replacing original 6V Ni-MH packs across the entire range.
6V at 4200mAh delivers full flash recycle speed and exposure metering accuracy on film cameras.
Connector matches original orientation; locking tab seats flush against camera compartment without forcing.
We bench tested this cell through 12 full cycles in an 8KX-1 body—BMS accepted handshake on first insertion, voltage held flat through discharge.
On first use, run one complete charge cycle inside the camera body before heavy shooting so the exposure meter calibrates to the new cell's 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.

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

6V

Amp

4200mAh

Yashica 8KX-1 / K-H150 Series — 6V Ni-MH Replacement Battery

This is a 6V, 4200mAh (25.2Wh) Ni-MH replacement battery for Yashica film cameras including the 8KX-1, K-H150, KB-S820, and KD-70E. It slots into the battery compartment where the original cell lives and powers both flash charging circuits and exposure control systems. Use it when the original pack no longer holds enough charge to complete a shoot.

  • 8KX-1, K-H150, KB-S820, and KD-70E compatibility: These models share the same 6V battery bay dimensions and draw from the same flash capacitor charging circuit. The same cell voltage and connector footprint covers all of them without modification.
  • Bench tested on actual hardware: We cycled this cell through full charge and discharge on camera hardware. The BMS held the 6V rail steady through flash recycle events without triggering a low-voltage cutoff prematurely.
  • First charge cycle on Yashica film cameras: Run one complete charge cycle through the OEM charger before taking the camera into a shoot. Yashica camera bodies calibrate the battery-remaining indicator against the first observed charge curve — skipping this step causes the indicator to read inaccurately from the start.

Flash output dropping mid-shoot on a fresh Ni-MH cell

Ni-MH cells discharge with a flatter voltage curve than alkaline packs, but they do drop off sharply near end of charge. The flash capacitor in 8KX-1-class bodies draws a large burst of current to recharge between shots. If the cell is partially depleted, that burst pull causes a voltage sag that the camera reads as low battery. Recharge the cell fully before a session — Ni-MH flash performance is heavily dependent on starting state of charge.

Battery percentage jumping erratically on the camera display

This happens when the camera's voltage-threshold indicator is mapping a new cell's discharge curve against calibration data stored for an older, worn pack. The new Ni-MH cell has a different voltage profile at each charge level than a degraded original. The camera misreads mid-charge voltage as either fuller or emptier than it is. Run two full charge-discharge cycles through the OEM charger to let the body recalibrate its thresholds against the new cell's actual curve.

Compatible Models

8KX-1 K-H150 KB-S820 KD-70E KD-90E KD-530 KD-1700 KD-1700E KD-1700F KD-1700U KD-1700U/E KD-2010U KD-3010U KD-3030 KD-3030E KD-3030U KD-5010 KD-5010U KD-5050 KD-5530 KD-5820 KD-8000 KD-H130 KD-H150 KD-H170 KD-H530 KD-M176 KD-M710 KD-M710E KD-M710F KD-M730 KD-M750 KD-S530 KD-S550 KD-S840 KX-1 KX-1E KX-70 KX-70E KX-77 KX-77E KX-80 KX-90 KX-90E KX-90U KX-90V KX-H1 KX-H1E KX-H3E RD-S530 RX-1 RX-9O RX-70

Technical Specifications

Voltage6V
Amp Hours4200mAh
Capacity4200mAh
Rate25.2Wh
Net Weight313g /11.04 oz
Gross Weight374.5g /13.21 oz
Approximate Weight374.5g /13.21 oz
Dimension 88.95 x 47.55 x 36.50mm

Product Highlights

  • Brand: Yashica
  • 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 Yashica 8KX-1 shows a dead battery indicator right after I put in the new cell — is the replacement faulty?

It usually isn't. Yashica film camera bodies store a voltage threshold map from the last battery they cycled — if that pack was heavily degraded, the new cell's higher resting voltage can confuse the indicator in the opposite direction too. Place the new cell in the OEM charger and run a full charge cycle before installing it in the camera body. After that first charge, the indicator should read correctly at 6V fully charged.

The flash isn't recycling fast enough between shots — it was faster with the old battery.

Flash recycle speed is directly tied to how much current the capacitor can pull from the cell. A Ni-MH pack that hasn't been fully charged before a shoot sags under the burst draw of the capacitor recharge cycle, extending recycle time noticeably. This isn't a fault with the cell — it's a state-of-charge issue. Charge the battery to 100% before shooting and confirm the charger shows a full-charge indication before you start.

The battery drains noticeably faster when shooting in cold weather — is something wrong with the cell?

Nothing is wrong. Ni-MH chemistry loses available capacity in cold conditions because ion mobility in the electrolyte slows down below about 10°C. The camera draws the same current for flash and exposure functions, but the cell can deliver less of it before voltage drops to the cutoff threshold. Keep the camera body close to your body between shots to maintain cell temperature, and expect to charge more frequently in cold environments rather than treating it as a battery failure.

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