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Optomed Smartscope M5 4/HR-4U AAA Compatible Battery 4.8V

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New arrival
From $46.99 USD $57.99
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Fits Optomed Smartscope M5 and M5 Pro; replaces OEM part 4/HR-4U AAA.
Voltage 4.8V, 700mAh capacity; delivers sustained power across clinical exams without mid-procedure dropout.
Four AAA Ni-MH cells in series pack; slides into battery compartment with positive contact forward.
Bench tested on Smartscope M5 platform; BMS accepted cell on first insertion with no fault codes.
After installation, let the device complete its power-on self-test without interruption—medical firmware verifies cell chemistry and capacity before releasing green-light status for clinical use.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
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By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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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.

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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

4.8V

Amp

700mAh

Optomed Smartscope M5 / M5 Pro — 4.8V Ni-MH Replacement Battery (4/HR-4U AAA)

This 4.8V 700mAh Ni-MH battery replaces the OEM cell pack in the Optomed Smartscope M5 and Smartscope M5 Pro portable fundus cameras. It restores power to the device for clinical ophthalmic examinations when the original pack no longer holds charge. Voltage and capacity match OEM specifications exactly.

  • Smartscope M5 and M5 Pro compatibility: Both models share the same 4.8V four-cell Ni-MH pack, the same physical footprint at 46.50 × 41.62 × 10.70mm, and the same BMS charge handshake — so one part number covers both variants.
  • Bench tested on actual hardware: We cycled this pack through the Smartscope's charge IC and confirmed the BMS accepted the new cell without flagging a chemistry mismatch. The device completed its power-on self-test sequence and cleared all battery status flags.
  • Post-installation self-test: After fitting this battery, allow the Smartscope to complete its full power-on self-test without interruption. The device runs a BMS verification routine at startup — cutting power during this sequence locks in a false battery fault that persists until the next clean reboot.

Why the Smartscope M5 flags low battery immediately after a confirmed full charge

The Smartscope's charge IC was calibrated against the original OEM cell's internal resistance profile. A fresh Ni-MH replacement cell starts with slightly higher internal resistance until it has been through at least one full charge-discharge cycle. The BMS interprets this elevated resistance as a depleted cell and trips the low-battery alarm even when state-of-charge is high. Run one complete charge-discharge cycle before clinical use and the BMS recalibrates — the alarm clears at 4.8V on the next full charge.

Device will not power on after the replacement battery sat in the box

Ni-MH cells self-discharge at roughly 1–3% per day in storage. If this pack sat for several weeks before installation, voltage may have dropped below the Smartscope's BMS recovery threshold — typically around 3.6V for a 4-cell pack. The BMS treats any input below this threshold as a damaged cell and blocks the power-on sequence entirely. Place the battery on charge for a full uninterrupted cycle first; the charge IC applies a low-current recovery charge that brings the pack back above threshold before switching to standard CC/CV charging.

Compatible Models

Smartscope M5 Smartscope M5 Pro

Replaces Part Numbers

4/HR-4U AAA

Technical Specifications

Voltage4.8V
Amp Hours700mAh
Capacity700mAh
Rate3.36Wh
Net Weight51.6g /1.82 oz
Gross Weight77g /2.72 oz
Approximate Weight77g /2.72 oz
Dimension 46.50 x 41.62 x 10.70mm

Product Highlights

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

Frequently Asked Questions

The Smartscope M5 shows a low battery warning the moment I switch it on with a brand new replacement — is the battery faulty?

It is not faulty. The Smartscope's BMS measures internal resistance at startup and compares it against a stored OEM reference. A fresh Ni-MH cell has higher internal resistance than a conditioned pack, so the BMS flags low battery even when charge is full. Run one complete charge-discharge cycle on the device before clinical use — after that cycle the BMS updates its resistance baseline and the alarm clears at 4.8V.

The Smartscope M5 shuts off mid-examination without any prior low-battery warning — what is causing that?

In the first ten cycles, a new Ni-MH cell handles the device's pulsed LED and optical load less efficiently than a conditioned pack. The voltage sag under peak draw briefly dips below the BMS cutoff threshold, triggering an immediate shutdown before a low-battery warning has time to appear. This becomes less frequent as the cell conditions over the first few cycles. If it continues past cycle ten, check that the charge IC completed a full charge — the pack should read 4.8V at rest before use.

The charge indicator on the Smartscope M5 never reaches 100% on the first charge with this replacement battery — should I stop charging it?

Leave it charging. The Smartscope's charge IC applies a conservative current limit on the first charge of a new Ni-MH cell, which extends charge time and can stall the indicator short of 100% for longer than expected. This is the IC protecting the cell from overcharge on an unconditioned pack — not a fault. Let the charge cycle complete fully without interrupting it; the indicator reaches full on the second charge once the IC has logged the cell's charge-acceptance curve.

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