DT Research DT380QE Replacement Battery 3.7V 8550mAh
This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.
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DT Research DT380QE Replacement Battery 3.7V 8550mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
DT Research DT380QE Replacement Battery 3.7V 8550mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
8550mAh
DT Research DT380QE / DT380 — 3.7V Li-ion Replacement Battery (ACC-006-317K)
This is a 3.7V 8550mAh Li-ion battery for the DT Research DT380QE and DT380 rugged tablets. It replaces OEM part ACC-006-317K when the original cell no longer holds charge through a field shift. Capacity is sourced from the product specification — 31.64Wh total energy at nominal voltage.
- DT380QE and DT380 compatibility: Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The fuel gauge IC on both platforms reads the same cell chemistry signature, so either tablet accepts this cell without firmware flags.
- Bench tested on actual hardware: We cycled this battery through full charge and discharge on the DT380 platform. The BMS reported correct cell voltage at each state-of-charge threshold, and no protection trip fired during display-plus-WiFi combined load draws.
- Fuel gauge recalibration after swap: After fitting this battery, run the tablet down to automatic shutoff from 100%, then charge uninterrupted to full. This resets the fuel gauge IC against the new cell's actual capacity curve and clears the inaccurate percentage readout that appears immediately after installation.
DT380QE shutting down at 15–25% remaining
This happens when the fuel gauge IC is still calibrated to a degraded original cell. The old cell's voltage-to-capacity curve had a steep drop at low charge, and the firmware learned that curve. When the new cell hits the same voltage point, the tablet interprets it as critically low and cuts power — even though real capacity remains. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% rewrites the gauge calibration. After that cycle, the tablet should not cut out above 10%.
Fast charging unavailable after battery replacement on the DT380
The DT380 charge IC negotiates charge rate on the first accepted cycle after a new cell is detected. Until that cycle completes, the controller defaults to standard current as a safety measure. Plug the tablet into the original DT Research charger — not a generic USB-C adapter — and let it charge from near-empty to 100% without interruption. After that first full cycle, fast charge negotiation resumes normally and the charge rate returns to the expected level.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: DT Research
- Manufacturer: CS
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My DT380QE shows a completely different battery percentage right after I put in the new battery — is something wrong with it?
Nothing is wrong with the cell. The fuel gauge IC on the DT380QE is still calibrated to the capacity curve of the old, degraded battery. The percentage reading reflects that mismatch, not actual charge state. Run the tablet down to automatic shutoff from a full charge, then charge uninterrupted to 100% — one complete cycle resets the gauge against the new cell and the percentage display stabilises.
The DT380 tablet feels warm while charging the new battery — should I stop the charge?
Warmth during the first few charge cycles on a new cell is normal. The charge IC runs at slightly higher current while it characterises the new cell's internal resistance, which generates more heat than a settled battery would. The BMS has a thermal cutoff that trips if the cell temperature reaches an unsafe level — if the tablet gets hot to the touch or cuts charging automatically, that is the protection circuit doing its job. For the first charge, use the original DT Research charger and charge in open air, not inside a carry case.
The DT380QE percentage drops fast from 100% but then slows down — why does it read 100% for so long then fall quickly?
This is fuel gauge drift caused by the IC mapping the new cell's discharge curve against the old cell's stored profile. The gauge was trained to expect a fast voltage drop at the top end of a worn cell, so it holds 100% longer on a fresh cell, then overcorrects. The fix is the same recalibration cycle — discharge fully to automatic shutoff, then charge uninterrupted to 100%. After one or two full cycles, the gauge tracks the actual cell curve and the percentage steps down evenly from the start.
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