Doro PhoneEasy 338 Compatible Battery 3.7V 800mAh
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Doro PhoneEasy 338 Compatible Battery 3.7V 800mAh - 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.
Doro PhoneEasy 338 Compatible Battery 3.7V 800mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
800mAh
Doro PhoneEasy 338 / 345 / 342 — 3.7V Li-ion Replacement Battery (01.10.CAREP0103)
This 3.7V 800mAh Li-ion battery replaces the original cell in the Doro PhoneEasy 338, PhoneEasy 342, PhoneEasy 345, and HandlePlus 334, along with nine additional compatible models. It restores power to devices where the original battery no longer holds charge through a normal day of use. Dimensions are 53.70 × 36.70 × 4.80mm — confirm these against the existing cell before fitting.
- PhoneEasy and HandlePlus compatibility: These models share the same battery bay dimensions, connector orientation, and 3.7V single-cell architecture. No BMS handshake is required — the charge IC on the phone communicates directly with the cell through a standard two-contact configuration.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the PhoneEasy platform. The BMS protection circuit triggered correctly at the low-voltage cutoff, and charge acceptance from the phone's onboard IC was normal throughout.
- Fuel gauge recalibration on first use: After fitting, allow one complete discharge down to automatic shutoff followed by a full uninterrupted charge. The phone's fuel gauge IC calibrates its reference curve against the new cell during this cycle — skipping it causes the percentage indicator to misread capacity from day one.
Why the PhoneEasy 338 reports wrong battery percentage after a cell swap
The phone uses a simple fuel gauge IC that estimates remaining charge based on a stored discharge curve from the original cell. A new cell has a different internal resistance and discharge profile — the IC does not detect the swap and keeps referencing the old curve. This mismatch produces percentage readings that jump, stall, or sit higher than actual charge. One full discharge-to-shutoff and uninterrupted recharge cycle resets the IC's reference and brings the readout back into alignment.
Sudden shutdown at 20–30% on the PhoneEasy after replacement
This happens when the cell voltage drops sharply under the load of an active call or screen wake — a behaviour called voltage cliff. The phone's protection circuit reads the voltage drop as a low-battery cutoff and shuts down, even though the percentage indicator showed charge remaining. It is more common in the first few cycles on a new cell before the fuel gauge IC has a calibrated curve to work from. After one full discharge-charge cycle, the IC tracks the voltage profile more accurately and shutdowns at false percentages stop.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Doro
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Doro PhoneEasy 338 won't turn on at all after the new battery sat in a drawer for weeks — is it dead?
The BMS protection circuit locks the cell out when voltage drops below approximately 2.5V, which happens during extended storage with no charge. Connect the phone to its charger and leave it for 20–30 minutes without pressing the power button — the charge IC needs to push enough current into the cell to bring it above the BMS recovery threshold before the phone will respond. If the charging indicator appears and then the phone powers on normally, the cell has recovered. If there is no response after 45 minutes on charge, check that the charger output is 5V and that the connector is clean.
The battery percentage on my PhoneEasy jumps around — it shows 60%, then drops to 15% within minutes of a call
This is the fuel gauge IC working from an inaccurate reference curve — it was calibrated to the original cell, not this one. Run the phone down until it shuts itself off automatically, then charge it in one uninterrupted session to 100%. That single full cycle gives the IC a measured discharge curve for the new cell, and erratic percentage jumps stop after it completes.
My PhoneEasy 338 feels warm near the battery during the first few charges after fitting — should I be concerned?
Mild warmth on the first two or three charges is normal. A new cell starts with higher internal impedance than a cycled one, and the phone's charge IC dissipates slightly more energy as heat while pushing current into it. The temperature should stay below uncomfortable-to-touch — if the phone becomes hot or the back panel warps, remove it from charge immediately. By the third full charge cycle, impedance drops and warmth during charging reduces noticeably.
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