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JE40 Motorola One Compatible Battery 3.8V 2900mAh

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From $24.99 USD $30.99
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Fits Motorola One, P30 Play, and P30 Play Dual SIM — replaces JE40 battery.
3.8V and 2900mAh deliver stable power to processor, display, and cellular radio.
Connector slides straight into slot; locking tab seats flush against phone frame.
We ran the pack through five full discharge cycles — BMS accepted charge protocol without delay.
On first use after installation, disable fast charging for one complete cycle to let the fuel gauge IC recalibrate against this cell's discharge curve.
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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.

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.

Voltage

3.8V

Amp

2900mAh

Motorola One / P30 Play Series — 3.8V Li-Polymer Replacement Battery (JE40)

The JE40 is a 3.8V, 2900mAh Li-Polymer cell that fits the Motorola One, P30 Play, P30 Play Dual SIM, and related variants. It powers the display, processor, and cellular radio. This listing covers the direct replacement for the original Motorola JE40 cell.

  • One and P30 Play platform fit: These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The JE40 cell measures 73.25 × 61.64 × 3.76mm — physical clearance is tight, so any swollen original cell needs full removal before fitting this replacement.
  • Bench tested on actual hardware: We ran the JE40 through charge and discharge cycles on P30 Play hardware. The BMS accepted the cell without fault codes, and the fuel gauge IC tracked state-of-charge correctly after one full calibration cycle.
  • Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC build an accurate discharge curve against the new cell before high-current charging begins on an uncalibrated reference.

Sudden shutdown at 20–30% on the Motorola One after a cell swap

A new cell has a slightly different voltage-versus-capacity curve than the aged cell the fuel gauge IC was calibrated to. When the phone hits a load spike — LTE handoff, screen-on burst — the cell voltage drops faster than the IC predicts, triggering a low-voltage shutdown even though the displayed percentage reads 20–30%. One full discharge to auto-off followed by an uninterrupted charge to 100% resets the coulomb counter. After that cycle, shutdowns at partial charge should stop.

USB fast charge not working on the first cycle after replacement

The Motorola One uses a TurboPower handshake between the charge IC and the battery BMS. On the first connection after a cell swap, the BMS may respond with a trickle-charge-only signal until it confirms cell integrity. This is normal — the phone will accept only standard 5V charging on cycle one. Plug into a TurboPower adapter after completing that first full charge cycle and the fast-charge handshake should resume at the expected voltage step.

Compatible Models

One P30 Pla P30 Play Dual SIM P30 Play Dual SIM TD-LTE XT1941-5 XT1941-3 XT1941-2 Moto G7 Optimo Moto G7 Optimo TD-LTE XT1952DL XT1952-3 XT1952-4 XT1952-2 XT1952-1

Replaces Part Numbers

JE40

Technical Specifications

Voltage3.8V
Amp Hours2900mAh
Capacity2900mAh
Rate11.02Wh
Net Weight41.2g /1.45 oz
Gross Weight66g /2.33 oz
Approximate Weight66g /2.33 oz
Dimension 73.25 x 61.64 x 3.76mm

Product Highlights

  • Brand: Motorola
  • Manufacturer: CS
  • Series: X-Longer
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Motorola One shuts off at around 25% after fitting the new JE40 — did I get a bad battery?

The cell is almost certainly fine. The fuel gauge IC on the Motorola One is still calibrated to the discharge curve of the old, degraded cell. When load spikes — screen brightness, LTE — pull current hard, the new cell's voltage drops faster than the IC expects and the phone triggers a protective shutdown. Run one full discharge to auto-off, then charge uninterrupted to 100%, and the coulomb counter will recalibrate to the new cell. Shutdowns at partial charge should stop after that cycle.

The percentage is jumping around erratically — it went from 60% to 40% in a few minutes without heavy use.

Erratic percentage readings after a JE40 swap come from the fuel gauge IC recalculating on the fly against a cell curve it hasn't seen before. The IC uses stored data from the old cell as its reference, so early readings are unreliable. Complete two full discharge-to-shutdown and uninterrupted charge-to-100% cycles. After the second cycle the IC has enough data points to track the new cell accurately and percentage jumps should stop.

Phone won't power on at all after the replacement battery sat in a drawer for a few months before I installed it.

Li-Polymer cells self-discharge in storage, and if the JE40 dropped below 2.5V per cell, the BMS enters a lockout state and blocks normal charging to prevent damage to an over-discharged cell. Plug into a Motorola OEM or certified charger and leave it connected for 30–45 minutes without pressing the power button — the charge IC will deliver a low-current pre-charge to bring the cell back above the BMS recovery threshold. Once the cell reaches approximately 3.0V, the BMS unlocks and normal charging resumes.

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