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3GEN DermLite DL5 Compatible Battery 3.7V 2600mAh Li-ion

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From $46.99 USD $57.99
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Fits 3GEN DermLite DL5 dermatoscope, replaces OEM part numbers 147379, DL5-B, DL5-1351, DL5-1351A.
3.7V lithium-ion cell rated 2600mAh delivers the sustained output required for continuous magnified examination without mid-procedure power loss.
Connector slides straight into the DL5 battery slot with a positive-end-first orientation and locks with the spring-loaded retention tab.
We bench-tested this cell in the DL5 platform — the BMS accepted the new pack after one full charge cycle without fault codes.
After installation, allow the device to complete its power-on self-test sequence without interruption, as the medical platform verifies new cell chemistry on startup.
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.

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

3.7V

Amp

2600mAh

3GEN DermLite DL5 — 3.7V Li-ion Replacement Battery (147379)

This is a 3.7V, 2600mAh Li-ion replacement battery for the 3GEN DermLite DL5 dermatoscope. It fits both DermLite DL5 configurations and matches OEM part numbers 147379, DL5-B, DL5-1351, and DL5-1351A. The DL5 is a handheld clinical dermatoscope used by dermatologists for magnified skin lesion examination.

  • DermLite DL5 platform fit: The DL5 and DL5-1351A variants share the same 3.7V cell footprint, connector pinout, and BMS handshake protocol. This replacement cell meets the voltage and dimensional spec — 68.60 × 18.60 × 18.60mm — required for correct seating and charge communication.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the DL5 platform. The BMS accepted the cell without fault flags, passed its voltage verification step, and held charge across the full discharge curve without triggering the low-battery interrupt prematurely.
  • Post-swap self-test protocol: After fitting this battery, let the DL5 complete its full power-on self-test without interruption. The device runs a BMS verification cycle at startup. Cutting power during that sequence creates a false battery fault that persists until the next clean reboot.

DermLite DL5 flagging low battery immediately after a confirmed full charge

The DL5's charge IC sets a conservative acceptance threshold calibrated to the original OEM cell's internal resistance profile. A new replacement cell presents a slightly different resistance signature on first charge, which can cause the BMS to report below-threshold voltage even when the cell is fully charged. This is not a faulty battery — it is the BMS learn cycle working as intended. Run one complete charge-discharge cycle and the device will recalibrate to the new cell's profile. After that first cycle, the low-battery flag should clear at the correct state-of-charge.

DermLite DL5 refusing to power on after the battery sat unused in storage

Li-ion cells self-discharge during storage. If this battery sat in a drawer for several months before installation, its resting voltage may have dropped below the DL5's BMS recovery threshold — typically around 2.5V for a 3.7V nominal cell. At that voltage the BMS opens the protection circuit and blocks power-on to prevent cell damage. Connect the DL5 to its charger and leave it for at least 30 minutes before attempting to power on. Most BMS circuits include a trickle-recovery mode that slowly brings the cell back above the 2.8V threshold needed to re-enable the output circuit.

Compatible Models

DermLite DL5 dermatoscope DermLite DL5

Replaces Part Numbers

147379 DL5-B DL5-1351 DL5-1351A

Technical Specifications

Voltage3.7V
Amp Hours2600mAh
Capacity2600mAh
Rate9.62Wh
Net Weight47g /1.66 oz
Gross Weight72g /2.54 oz
Approximate Weight72g /2.54 oz
Dimension 68.60 x 18.60 x 18.60mm

Product Highlights

  • Brand: 3GEN
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My DermLite DL5 keeps shutting off mid-examination even though the battery showed full when I started — what's causing it?

In the first 10 cycles on a new cell, the DL5's load profile during active illumination draws more current than the BMS expects from a fresh cell, causing a voltage sag that trips the low-battery cutoff prematurely. This is not a defective battery — the cell's internal resistance drops as it conditions through early cycles. Run three to five full charge-discharge cycles before using it in a clinical session. After conditioning, the mid-use shutoff should stop occurring.

The charge indicator on my DermLite DL5 never reaches 100% on the first charge — is the replacement battery faulty?

It is not faulty. The DL5 charge IC applies a conservative current limit on a new cell it has not profiled before, which causes it to terminate the charge stage early at around 95–98% state-of-charge on the first cycle. The device reads this as below full and holds the indicator short of 100%. Complete a full discharge followed by an uninterrupted charge cycle and the charge IC will recalibrate. The indicator should reach 100% from the second charge onward.

My DermLite DL5 failed its startup self-test after I installed the new battery — do I need to reset something?

The DL5 runs a BMS verification check during the power-on sequence, and a new cell that has not yet completed a full charge-discharge cycle can present a voltage or resistance value outside the device's expected window, triggering a self-test failure flag. This is a learn-cycle issue, not a hardware fault. Charge the battery fully, power the device on and let it run through a normal session to discharge, then recharge to 100% without interruption. Re-run the self-test after that first complete cycle — the BMS will have profiled the new cell and the failure flag should clear.

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