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LG Rebel 2 Replacement Battery BL-45F1F 3.85V 2000mAh

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From $25.99 USD $31.99
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Fits LG Rebel 2 and replaces OEM part number BL-45F1F.
3.85V, 2000mAh capacity restores full charge cycles on the Rebel 2 smartphone.
Connector slides into the battery slot with the contact strip facing the device.
We ran full discharge cycles on test units; BMS accepted charge without fault codes.
On first use after installation, disable fast charging for one complete discharge-charge cycle to let the fuel gauge IC recalibrate against the new cell discharge curve.
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Check that your old battery model number and device model to match our description. This makes sure they work together.

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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

3.85V

Amp

2000mAh

LG Rebel 2 / Aristo Series — 3.85V Li-ion Replacement Battery (BL-45F1F)

This is a 3.85V, 2000mAh Li-ion replacement battery for the LG Rebel 2, Aristo, L57BL, L58VL, and related variants using OEM part number BL-45F1F. It physically matches the original cell dimensions (75.18 × 50.10 × 4.42mm) and uses the same connector and BMS contact layout. Swap it in when the original cell no longer holds charge through a normal day of calls, messaging, and background data.

  • Rebel 2 / Aristo platform compatibility: The L57BL, L58VL, Aristo, and Rebel 2 all share the same battery bay dimensions, BMS contact pinout, and 3.85V voltage rail — which is why one cell number covers the full group. The BMS handshake between battery and charge IC is identical across these variants.
  • Bench tested on actual hardware: We cycled this cell on the Rebel 2 platform and confirmed the BMS communicates correctly with the charge IC at full current. Capacity read-back at the fuel gauge matched the rated 2000mAh within normal cell tolerance on the second full cycle.
  • Fuel gauge recalibration after install: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes into an uncalibrated state — skipping this step is the main cause of erratic percentage readings in the first few days.

Why the Rebel 2 shuts down suddenly at 20–30% after a cell swap

The Rebel 2's fuel gauge IC holds a charge curve learned from the old, degraded cell. When the new cell is installed, the IC still uses that old curve as its reference. At around 20–30% reported charge, the modem or screen draws a brief high-current spike that the old curve predicts the cell cannot handle — so the IC triggers a protective shutdown. The phone still has real charge left; the gauge simply doesn't know it yet. One full discharge-to-charge cycle clears the stored curve and writes a new one matched to the replacement cell.

Phone won't power on after the replacement battery sat in storage

Li-ion cells self-discharge in storage, and if the cell voltage drops below roughly 2.5V per cell, the BMS locks out to prevent damage — the phone will show nothing when you press the power button. Connect the phone to a wall charger (not a PC USB port) and leave it for 15–20 minutes without attempting to power on. The charge IC needs to trickle current into the cell until it clears the BMS lockout threshold, typically around 2.8–3.0V, before the phone will boot. If no charge indicator appears after 30 minutes on a wall adapter, check that the battery contacts are fully seated.

Compatible Models

Rebel 2 L57BL L58VL Aristo M210 MS210 Fortune M153 K8 2017 Aristo LTE US215 M200N X240 LV3 Phoenix 3 M150 Risio 2 M154 K10 Pro 2017 K10 Pro 2017 Dual SIM K10 Pro 2017 Dual SIM TD-LTE M400AR Stylus 3 M400DK M400MT PH3 M400Y M400F M400DF M400N K8 X210K X2 2018 X2 2018 LTE X210L X210S X210ULM K8+ 2018 K8+ 2018 LTE X210ULMA X210ULMG LMX210CM LMX210EM LMX210EMW LMX210NMW K9 2018 LMX210BMW K9 TV 2018 K9 TV 2018 Dual SIM LTE X210E LMX210YMW X212TAL Aristo 2 Plus LMX210MA MS210UK M210N DLGN5008 K4 2017 X230 K4X230TI LG-X230YK LG-M151 M160 M160E X230DSF X240dsF LGL58VL STLGL58VCP LMX210AP Phoenix 4 X210APM Fortune 2 Risio 3 K4 Fortune M153 Phoenix 3 M150 Fortune L57B LV3 MS210 Fortune M153 Rebel 2 L58VL Rebel 4 LML212VL Aristo 2 Risio Tribute

Replaces Part Numbers

BL-45F1F EAC63382107 EAC63361401 EAC63321601 EAC63361407 EAC63382101 EAC63382101LL EAC63821011LL EAC63382101LLL

Technical Specifications

Voltage3.85V
Amp Hours2000mAh
Capacity2000mAh
Rate7.7Wh
Net Weight38.6g /1.36 oz
Gross Weight88.6g /3.13 oz
Approximate Weight88.6g /3.13 oz
Dimension 75.18 x 50.10 x 4.42mm

Product Highlights

  • Brand: LG
  • 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 LG Rebel 2 percentage jumps around — showing 45% one minute then 20% the next after I put in the new battery. Is the replacement faulty?

The cell is almost certainly fine — the fuel gauge IC is recalibrating against the new cell's discharge curve after being mapped to the old degraded one. Erratic percentage jumps are the most common symptom of a mismatched gauge curve, not a bad cell. Run one complete discharge (let it shut off naturally) followed by a full uninterrupted charge to mains. After that cycle, the coulomb counter rewrites its reference and percentages stabilise.

Fast charging stopped working on my Rebel 2 right after I installed this battery — it's only trickling in now.

On the first charge cycle after a cell swap, the charge IC on the Rebel 2 sometimes falls back to standard current rather than accepting the higher charge rate — this is the BMS on the new cell negotiating with the phone's charge controller for the first time. Let the phone complete one full charge at the lower rate without interrupting it. On the second cycle, fast charging typically re-engages once the BMS and charge IC have completed their initial handshake and the IC trusts the cell's internal resistance reading.

The back of my Rebel 2 feels warm near the battery for the first 10–15 minutes of charging after the swap — is something wrong?

A new cell has higher internal impedance than a worn-in one, so the charge IC pushes more voltage across that resistance during the first few cycles — that energy appears as heat. It should be mild warmth, not hot to the touch. If the phone is uncomfortably hot or the back stays warm past the first 15 minutes of a standard charge, remove the battery and confirm the contacts are aligned correctly — a misaligned contact can cause uneven current distribution across the cell.

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