Welcome to our store. Your trusted source for batteries and power solutions. Learn more

For support or quotes: sales@batteryweb.com
WELCOME5
BatteryWeb

Google Pixel 3A Compatible Battery G020E-B 3.85V 2900mAh

Up to 20% off
New arrival
From $25.99 USD $31.99
Shipping calculated at checkout.
Fits Google Pixel 3A and replaces OEM battery G020E-B.
Supplies 3.85V and 2900mAh — restores full charge capacity on the Pixel 3A processor, display, and modem.
Connector slides into the battery slot with the contact pads facing the phone's charge IC; no locking tab.
We bench-tested this cell against a Pixel 3A motherboard; the BMS accepted USB-PD on cycle two after initial charge handshake.
On first use after installation, disable fast charging for one complete discharge-charge cycle — this lets the fuel gauge IC recalibrate against the new cell discharge curve before high-current fast charging pushes current into an uncalibrated cell.
Visa Mastercard American Express PayPal Apple Pay Google Pay Shop Pay Discover Klarna Afterpay Stripe
✦

Check that your old battery model number and device model to match our description. This makes sure they work together.

✦

We ship your order same day if you buy it before 4 PM EST.

Warranty

Let customers speak for us

from 11 reviews

Product is exactly as described and arrived quickly

Robert Jones
Rocket ES4-12 Compatible Replacement Battery

It took a bit longer than expected, likely due to the holiday season, but that was understandable. So far, the battery seems to be working well!

Linda M.
MGE UPS Systems Pulsar EX 1500RT Compatible Replacement Battery By Bright Way

Excellent substitute for the original, appearing to be the perfect replacement.

Alberto J.
APC SMART-UPS RT SURTA3000RMXL3U UPS High Performance Replacement Battery Set

It was what i was looking for. Support is fast

Jaswal
WAHEGURUG - RADHASWAMI

Fast service

Mark Casias
BatteryWeb

Perfect fit

Mark Casias
STX20L-BS Battery for Harley Softail FLS FLST 1991-2017 High Performance

Works Perfectly!!

Ben Benson
Invacare 220 Scooter High Performance Medical Replacement Battery Set

Send Your Battery Photo

Expert Technician Help

Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.

POST YOUR BATTERY IMAGE
Product & Solutions Expert

Product & Solutions Expert

✉ sales@batteryweb.com

🔹 10+ Years Battery Experience 🔹 Fast & Accurate Identification

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

2900mAh

Google Pixel 3A — 3.85V Li-Polymer Replacement Battery (G020E-B)

This 3.85V, 2900mAh Li-Polymer battery replaces the original G020E-B cell in the Google Pixel 3A. It fits Pixel 3A variants across model codes G020H, G020G, and G020E. Swap it in when the original cell no longer holds a useful charge through a normal day.

  • Pixel 3A variant compatibility: The G020H, G020G, and G020E share the same 3.85V battery bay, connector pinout, and BMS handshake. One cell covers all three regional variants without modification.
  • Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Pixel 3A unit. The BMS accepted the cell without throwing a hardware fault, and the fuel gauge IC initialised correctly on the first full cycle.
  • Fuel gauge recalibration on first use: After installation, disable fast charging and run one complete discharge-to-charge cycle at standard speed. This lets the fuel gauge IC build an accurate discharge curve against the new cell before high-current charging is introduced into an uncalibrated system.

Sudden shutdown at 20–30% after replacing the Pixel 3A battery

A new cell has a slightly different discharge curve than the aged cell the fuel gauge IC was trained on. When the phone loads the modem or screen at full brightness, voltage drops faster than the IC predicts — it reads a safe percentage but the cell voltage hits the cutoff floor. The result is an abrupt shutdown with charge still showing on screen. One full slow discharge-to-charge cycle forces the coulomb counter to recalibrate against the real curve of the new cell. After that cycle, shutdowns at 20–30% typically stop.

USB-PD fast charging not activating on the first cycle after swap

On the first charge after a cell swap, the Pixel 3A's charge IC sometimes stays in trickle or standard mode rather than negotiating the USB-PD fast charge contract. This happens because the IC enters a conservative mode when it cannot verify the new cell's state of health. Plug in the supplied or an 18W USB-PD charger and leave the phone untouched through a full charge to 100%. On the second and subsequent charges, the IC re-enters fast charge negotiation normally.

Compatible Models

Pixel 3A G020H G020G G020E G020F

Replaces Part Numbers

G020E-B

Technical Specifications

Voltage3.85V
Amp Hours2900mAh
Capacity2900mAh
Rate11.17Wh
Net Weight42.6g /1.50 oz
Gross Weight67.6g /2.38 oz
Approximate Weight67.6g /2.38 oz
Dimension 67.58 x 57.05 x 4.62mm

Product Highlights

  • Brand: Google
  • 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 Pixel 3A keeps shutting off at around 25% after I put in the new battery — why?

The fuel gauge IC in the Pixel 3A was calibrated to the discharge curve of the original aged cell. The new cell's voltage drops at a different rate under modem or display load, so the IC underestimates how close the cell is to its cutoff voltage. Run one full discharge down to automatic power-off, then charge to 100% at standard speed without fast charging enabled. After that single recalibration cycle, the shutdowns at 20–30% should stop.

The battery percentage on my Pixel 3A is jumping around erratically after the replacement — is the cell faulty?

The coulomb counter hasn't mapped the new cell yet. It's still using the charge model from the old degraded battery, so small load spikes — like the modem connecting to a cell tower — cause the percentage reading to jump. This is a firmware-side recalibration lag, not a defective cell. Charge the phone to 100%, use it normally until it shuts off on its own from low battery, then charge back to 100% uninterrupted — the gauge IC will lock onto the correct curve by the end of that cycle.

The phone gets noticeably warm near the battery during the first few charges after the swap — should I be worried?

A new Li-Polymer cell has higher internal impedance than a well-used one that the charge IC is expecting. The charge IC compensates by pushing slightly more voltage during the constant-current phase, which generates more heat at the cell surface until it settles. This is normal for the first two to three charge cycles as the cell conditions. If the warmth persists past the third full charge or the phone becomes hot rather than warm, check that the battery connector is fully seated and the adhesive isn't trapping heat against the rear housing.

Payment & Security

Payment methods

  • American Express
  • Apple Pay
  • Bancontact
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Related Products

Google Pixel 3A Replacement Battery, 3.85V, 2900mAh, Li-Polymer 1

Engineered for Performance. Built to Last.

Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.

Our Collections