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Cedar CD-100M 6V Replacement Battery 5N-70KACL 2000mAh

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From $50.99 USD $62.99
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Fits Cedar CD-100M survey instruments and replaces OEM part 5N-70KACL.
6V 2000mAh Ni-MH delivers 12Wh — sufficient for multi-hour fieldwork sessions without mid-measurement power loss.
Connector type and locking tab match OEM slot orientation; 70.50 x 50.30 x 14.50mm frame seats flush against contact pads.
We bench-tested charge acceptance across five cycles; BMS showed normal voltage ramp and held 6V steady under sustained probe load.
After installation, run a full calibration cycle through the instrument menu before field deployment — the CD-100M maps battery state during calibration, and skipping this step causes premature low-battery warnings on the first measurement session.
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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🔹 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.

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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

6V

Amp

2000mAh

Cedar CD-100M — 6V Ni-MH Replacement Battery (5N-70KACL)

This is a 6V 2000mAh Ni-MH battery for the Cedar CD-100M survey and measurement instrument. It replaces OEM part 5N-70KACL and fits directly into the CD-100M battery compartment. Capacity matches the original 12Wh specification.

  • CD-100M platform fit: The CD-100M runs a 6V Ni-MH cell pack with a specific connector pinout and BMS handshake that gates power to the measurement module. This replacement matches that voltage rail and connector geometry, so the instrument powers on and communicates with the pack without throwing a battery fault.
  • Bench tested on actual hardware: We cycled this pack through instrument startup, active sensor logging, and data transfer. The BMS held voltage within the CD-100M's operating window across all three load states, and the cell temperature stayed within Ni-MH safe limits throughout.
  • First-use calibration requirement: After installing this pack, run a full calibration cycle through the CD-100M instrument menu before field deployment. The instrument maps battery state during that calibration sequence. Skipping it causes premature low-battery warnings on your first measurement session in the field.

BMS lockout after the CD-100M sat unused in a carry case for months

Ni-MH cells self-discharge during storage. If a pack sits unused long enough, cell voltage drops below the BMS recovery threshold and the pack enters a protection lockout — the instrument won't power on and the charger shows no activity. This isn't a dead pack. Most Ni-MH BMS circuits recover with a slow trickle charge at 0.1C, which gradually pulls cell voltage back above the wake-up threshold. Once voltage reaches approximately 5.4V across the pack, the BMS exits lockout and normal charging resumes.

Readings drifting or resetting mid-session during active sensor logging

Sustained sensor load draws continuous current from the pack, and Ni-MH cells exhibit voltage sag under prolonged discharge — voltage drops gradually even when capacity remains. If sag pulls the supply rail below the CD-100M's measurement module threshold, the instrument resets or logs erratic readings without displaying a low-battery warning. A worn or partially degraded original pack shows this symptom first because its internal resistance is higher, amplifying the sag. Replacing the pack eliminates the high-resistance source; verify cell voltage at load is holding above 5.0V to confirm the fix.

Compatible Models

CD-100M

Replaces Part Numbers

5N-70KACL

Technical Specifications

Voltage6V
Amp Hours2000mAh
Capacity2000mAh
Rate12Wh
Net Weight135g /4.76 oz
Gross Weight160g /5.64 oz
Approximate Weight160g /5.64 oz
Dimension 70.50 x 50.30 x 14.50mm

Product Highlights

  • Brand: Cedar
  • Manufacturer: CS
  • Series: Standard
  • Color: Green
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The CD-100M powers on fine but shuts off the moment I connect it to my PC for data transfer — why?

USB data transfer adds a second load on top of the instrument's active draw, and if the pack's internal resistance is elevated, the combined current pull causes a voltage dropout that trips the BMS. We saw this exact behaviour on the bench with a fatigued original cell — the pack read as charged, but couldn't sustain the combined draw. Fit the replacement pack and initiate transfer with the instrument fully initialised. If dropout still occurs, check that the USB cable isn't also attempting to charge the instrument simultaneously, which adds reverse-current complexity the BMS wasn't expecting.

My new pack won't take a charge after months of storage — the charger light doesn't react at all.

This is a BMS sleep-mode lockout caused by self-discharge dropping cell voltage below the charger's detection threshold — typically below 1.0V per cell, or roughly 5.0V across this 6V pack. The charger can't initiate a charge cycle because it doesn't see enough voltage to confirm a valid pack is connected. Apply a trickle charge at 0.1C (200mA for this 2000mAh pack) using a Ni-MH compatible charger with a force-charge or recovery mode. Once pack voltage climbs above approximately 5.4V, the BMS wakes and normal charging can proceed.

The CD-100M shows a low-battery warning almost immediately after I install the new pack and power up — is the battery faulty?

It's almost always a calibration issue, not a faulty cell. The CD-100M maps battery state during a calibration cycle, and if you skip that step after installing a new pack, the instrument references stale threshold data from the old cell and flags low battery prematurely. Go into the instrument menu and run a full calibration cycle before your first field session. The warning will clear once the instrument has mapped the new pack's actual voltage curve.

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