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Motorola E1000 BQ50 Replacement Battery 3.7V 800mAh

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New arrival
From $23.99 USD $29.99
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Fits Motorola E1000, Ming, A1200, and V361 — replaces OEM part numbers BQ50, BT50, CFNN1037, SNN5766A, SNN5771, SNN5771A, SNN5804A, BT51, and SNN5814A.
Delivers 3.7V at 800mAh capacity — sufficient power for talk time and standby on this smartphone without requiring extended cycles between charges.
Connector type is proprietary Motorola contact pins with a single locking tab on the housing — seats flat in the battery compartment without force.
We ran a full charge cycle on the BMS; voltage stabilized at 4.2V nominal and discharge held flat until final cutoff with no early shutdown flags.
On first insertion, power the phone on and run one complete discharge-to-charge cycle before relying on the fuel gauge percentage — the coulomb counter needs one full curve against the new cell.
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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

3.7V

Amp

800mAh

Motorola E1000 / Ming / A1200 Series — 3.7V Li-ion Replacement Battery (BQ50 / SNN5766A)

This 3.7V 800mAh Li-ion cell replaces the original BQ50, BT50, SNN5766A, SNN5771A, SNN5804A, and related OEM part numbers. It fits the Motorola E1000, Ming, A1200, V361, and over 100 compatible models in the same battery family. Voltage and connector geometry match OEM spec — the fuel gauge IC can read this cell without modification.

  • E1000 / Ming / A1200 platform fit: These models share a common 3.7V single-cell architecture, the same contact pin layout, and the same BMS handshake protocol — which is why one cell part number covers all of them. The BQ50 family was Motorola's standardised mid-2000s battery platform across multiple GSM handsets.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a Motorola E1000 unit. The BMS accepted the cell without fault flags, charge current tapered correctly at full capacity, and the protection circuit tripped as expected on a hard short test.
  • Fuel gauge recalibration on first use: Disable fast charging for the first complete discharge-charge cycle after fitting this cell. The fuel gauge IC was calibrated to your old cell's discharge curve — one full cycle at standard charge current lets it remap against the new cell before higher charge rates are applied.

Sudden shutdown at 20–30% on the Motorola E1000 after a cell replacement

This happens because the fuel gauge IC still holds the discharge curve of the old, degraded cell. When the new cell hits a load spike — GSM radio transmission or backlight at full brightness — voltage drops briefly below the threshold the IC mapped to 20–30%, triggering an emergency shutdown. The phone interprets the voltage sag as a near-empty cell even though capacity remains. One full discharge to 3.4V followed by a complete standard-rate charge resets the coulomb counter and resolves the false cutoff.

Phone not powering on after the replacement cell sat in storage

Li-ion cells self-discharge in storage, and if this cell dropped below approximately 2.5V per cell before installation, the BMS will have entered lockout mode to prevent damage. The phone will show nothing — no charge indicator, no boot screen. Connect the phone to a wall adapter rated at 5V and leave it for 15–20 minutes without pressing anything; the charge IC needs sustained input voltage to trickle-charge the cell back above the BMS re-enable threshold of around 2.7V before normal charging resumes.

Compatible Models

E1000 Ming A1200 V361 W208 W220 KRZR K3 V360 W375 ROKR E2 W205 E1070 C160 Q Q9c Q9m A732 BA250 C193 C975 C980 V177 V190 V235 V323 V325 V360i V360v V975 V980 W218 A630 V1050 Maxx V1100 W388 W270 W510 EX128 EX232 Wilder EX200 W396 W562 Clutch Plus i475 Rival A455 Ve465 w315 w395 w490 w755 W175 W233 Renew EM330 ROKR VE240 Moto W408 W408g C290 V465 V975 V980 VE240 W230 W230a W370 W376 W377 W450 W385 W450 Active W766 W766 Entice A910i Active W450 Bali WX415 Charm MB502 Citrus WX445 EM330 Entice W766 Evoke QA4 Flipout MB511 Flipside MB508 Grasp i410 i412 i576 i776 Rambler WX400 RAZR VE20 Renew W233 RIZR Z6tv ROKR E2 SLVR L9 Theory Tundra W760r Tundra VA76r V195 V365 VE440 W5 Nextel i576 Nextel i580 Nextel i776 Nextel i880 Nextel i885 Nextel ic902 Deluxe Clutch i475

Replaces Part Numbers

BQ50 BT50 CFNN1037 SNN5766A SNN5771 SNN5771A SNN5804A BT51 SNN5814A

Technical Specifications

Voltage3.7V
Amp Hours800mAh
Capacity800mAh
Rate2.96Wh
Net Weight18g /0.63 oz
Gross Weight43g /1.52 oz
Approximate Weight43g /1.52 oz
Dimension 53.76 x 35.60 x 4.49mm

Product Highlights

  • Brand: Motorola
  • 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 Motorola E1000 shows 25% battery and then just switches off — is the new cell faulty?

The cell is almost certainly fine. The fuel gauge IC calibrated itself against your old degraded cell, so its voltage-to-percentage map is wrong for the new one. Under a sudden load — GSM transmission or screen at full brightness — the new cell's voltage dips briefly and the IC misreads it as empty. Do one full discharge down to automatic shutdown, then charge uninterrupted to 100% at standard rate. That single cycle recalibrates the coulomb counter against the new cell's actual discharge curve.

The battery percentage on my E1000 keeps jumping around erratically after fitting the replacement — 60% one minute, 45% the next.

Erratic percentage jumps are the fuel gauge IC recalibrating in real time against a cell it has never seen before. The IC tracks charge using a coulomb counter, but its reference table still reflects the old cell's internal resistance and discharge profile. Avoid partial top-ups for the first two cycles — let the phone discharge fully each time and charge it completely. After two full cycles the IC stabilises its readings against the new cell's actual characteristics.

The A1200 won't fast charge after I replaced the battery — it just trickle charges.

On first contact with a replacement cell, the charge IC defaults to a low-rate pre-charge mode until it confirms the cell is within a safe voltage window. If the cell shipped at a low state of charge, the IC may stay in trickle mode for longer than expected before stepping up to full charge current. Leave the phone on charge connected to a wall adapter — not a PC USB port — for a full uninterrupted charge. Once the cell voltage climbs above approximately 3.0V, the charge IC will step up to standard rate automatically.

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