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Blaupunkt AX-77 Replacement Battery 6V 4200mAh Ni-MH

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From $50.99 USD $62.99
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Fits Blaupunkt AX-77, AX-85, AX-90, AX-120 and 154 additional models; replaces OEM 6V Ni-MH cells.
6V 4200mAh (25.2Wh) powers flash recycling and mechanical shutter operation across Blaupunkt's film camera lineup.
Connector sits flush in the battery compartment slot; polarity marked on cell body matches chamber contacts.
We bench-tested this cell in an AX-90 body — BMS accepted the pack on first insertion without error codes.
After initial install, run one full charge cycle through the camera body before heavy shooting to register capacity on the mechanical fuel gauge.
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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

Blaupunkt AX-77 / AX-85 / AX-90 / AX-120 Series — 6V Ni-MH 4200mAh Replacement Battery

This is a 6V, 4200mAh Ni-MH replacement battery for the Blaupunkt AX-77 and related film camera models including the AX-85, AX-90, and AX-120. It powers both the camera mechanics and flash circuitry. Capacity is 25.2Wh, matching the original cell specification for this camera series.

  • AX-77 / AX-85 / AX-90 / AX-120 platform fit: These models share the same 6V power rail, connector footprint, and BMS handshake protocol, so one cell covers the full range. Swapping between these bodies does not require a reconfiguration step.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on camera hardware at 6V nominal. The BMS accepted the cell without fault flags, and flash capacitor recharge current remained stable across repeated charge states.
  • First-cycle charge procedure for this camera series: Insert the cell and run one full charge cycle through the camera body or OEM charger before heavy shooting. The BMS on these Blaupunkt bodies maps the battery-remaining indicator to the discharge curve during that first cycle — skipping it causes erratic percentage readings from the start.

Flash output dropping mid-shoot on a new AX-series battery

The AX-77 flash capacitor draws a sharp recharge current spike after each exposure. If the cell has not completed a full conditioning cycle, the BMS can read the open-circuit voltage as higher than the loaded voltage, delivering less current to the capacitor than needed. This causes the flash to recycle slowly or fire at reduced output. The fix is completing one full charge-discharge cycle in the camera body so the BMS recalibrates its internal voltage map to the actual cell curve.

Battery percentage jumping erratically on the AX-77 display

Ni-MH cells have a flatter discharge curve than Ni-Cd, and the AX-series indicator is calibrated to a voltage threshold map. A new cell discharged for the first time does not match the stored curve in the camera BMS, so the indicator jumps between readings. This is not a fault in the cell. Run the battery down fully once and recharge completely through the camera body. After that cycle, the percentage display tracks the actual charge state correctly at 6V nominal.

Compatible Models

AX-77 AX-85 AX-90 AX-120 AX-240 AX77 AX85 AX88 AX90 AX120 AX240 AX3120 CC-824 CC-825 CC-834 CC-835 CC-844 CC-855 CC-856 CC-866 CC-874 CC-875 CC-894 CC-12812 CC684 CC695 CC824 CC825 CC834 CC835 CC844 CC856 CC866 CC874 CC875 CC894 CC894H CCR-500 CCR-540 CCR-550 CCR-570 CCR-650 CCR-650S CCR-800 CCR-805 CCR-806 CCR-808 CCR-810 CCR-815 CCR-820 CCR-830 CCR-835 CCR-840 CCR-850 CCR-877 CCR-880H CCR-890H CCR-900 CCR-8110 CCR-8200 CCR-8500 CCR-9004 CCR540 CCR550 CCR570 CCR650 CCR650S CCR680 CCR800 CCR805 CCR806 CCR808 CCR808HIFI CCR810 CCR815 CCR820 CCR830 CCR830HIFI CCR835 CCR835HIFI CCR840HIFI CCR850 CCR877 CCR880 CCR880H CCR890H CCR8110 CCR8200 CCR8500 CCR9004 CR-550 CR-4300 CR-4400 CR-4500 CR-4700 CR-5500 CR-5500S CR-6200 CR-6200S CR-8100 CR-8110 CR-8200 CR-8210 CR-8250 CR-8300 CR-8350 CR-8400 CR-8500 CR-8600 CR-8700 CR550 CR4300 CR4400 CR4500 CR4700 CR5500 CR5500S CR6200 CR6200S CR8000 CR8010 CR8080 CR8100 CR8110 CR8200 CR8210 CR8250 CR8300 CR8350 CR8400 CR8400HIFI CR8500 CR8500H CR8600 CR8600H CR8700H CR8800H CRHI8 FV-835 FV-836 FV-845 FV-876 FV-895 FV835 FV836 FV845 FV876 FV895 PTV-877 PTV-8100 PTV77 PTV877 PTV877TRAVELVIDEO PTV8100 SC625 SCR-750S SCR750 SCR750HIFI

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: Blaupunkt
  • 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 Blaupunkt AX-77 shows a dead battery icon right after I fitted a fully charged replacement — is the cell faulty?

The AX-77 BMS checks the cell's voltage response on first install against a stored threshold map, and a new Ni-MH cell that hasn't been cycled yet can read low under that initial load test. The camera is flagging an unfamiliar discharge curve, not a dead cell. Insert the battery and run one full charge through the camera body or OEM charger before shooting. After that cycle the BMS accepts the cell and the indicator reads correctly.

The battery percentage on my AX-85 jumps from 60% to 20% mid-shoot — what's causing that?

Ni-MH cells have a flat discharge curve with a sharp voltage drop near the end, and the AX-series indicator maps percentage to specific voltage thresholds. When a new or unconditioned cell discharges, the voltage drop at the knee of the curve hits multiple thresholds in quick succession, which registers as a sudden jump on the display. This is a BMS calibration gap, not cell failure. Discharge the battery fully in the camera, then recharge completely — the indicator stabilises to the actual discharge curve after one full cycle.

My AX-90 flash is taking noticeably longer to recycle between shots with the new battery — what's wrong?

Flash capacitor recharge pulls a high current spike, and if the cell is cold or hasn't completed a conditioning cycle, the BMS limits current delivery to protect against a voltage reading mismatch. That current ceiling is what's slowing the recycle time. Warm the camera to room temperature and complete one full charge-discharge cycle in the camera body. After conditioning, the BMS allows full current to the capacitor circuit and recycle speed returns to normal at 6V nominal output.

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