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

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

Meder SmartGuide 2 Replacement Battery 3.8V 3900mAh

Up to 20% off
New arrival
From $25.99 USD $31.99
Shipping calculated at checkout.
Fits Meder SmartGuide 2 and SmartGuide 210-464 models; replaces OEM part AHB466684.
3.8V, 3900mAh lithium-polymer cell delivers sustained voltage under full processor and display load.
Connector seats flush against the battery slot; locking tab engages on both sides to prevent dislodging.
Bench testing showed the BMS accepted a standard 5V/2A charge input; fuel gauge IC required one full discharge-charge cycle to sync with new cell curve.
On first use after installation, run one complete discharge-charge cycle at standard (non-fast) charging speed to let the fuel gauge IC recalibrate against this cell's discharge profile before fast charging.
Delivery time

This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
WECARE5

Please Confirm Delivery Timeline

Fresh Battery, Worth the Wait

To provide the highest-quality replacement battery, we ship this battery directly from the manufacturer rather than from aging warehouse inventory. This means delivery may take a little longer, but it helps ensure you receive a fresh battery with better performance, a longer lifespan, and greater reliability.

Estimated delivery: 7–10 business days
4.8
★★★★★
★★★★★
Average Customer Rating
By continuing with your purchase, you acknowledge and agree to the estimated 7–10 business day delivery timeframe.
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

3.8V

Amp

3900mAh

Meder SmartGuide 2 / SmartGuide 210-464 — 3.8V Li-Polymer Replacement Battery (AHB466684)

This 3.8V 3900mAh Li-Polymer battery replaces the original AHB466684 cell in the Meder SmartGuide 2 and SmartGuide 210-464 smartphones. It restores power to the display, processor, modem, and all onboard connectivity. Dimensions are 85.20 × 63.50 × 4.50mm — measure your original cell before installing to confirm fit.

  • SmartGuide 2 and 210-464 compatibility: Both models share the same battery bay geometry, connector pinout, and BMS handshake protocol — one cell covers the full range without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the SmartGuide platform. The BMS accepted the cell, charge termination triggered correctly at 4.35V, and protection cut-off activated as expected at the low-voltage threshold.
  • 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 recalibrate its coulomb counter against the new cell's discharge curve before high-current charging pushes into an uncalibrated state.

Sudden shutdown at 20–30% on the SmartGuide 2 after cell replacement

This is a voltage cliff failure. Under modem transmission or screen brightness peaks, the new cell momentarily drops below the BMS low-voltage threshold even though the fuel gauge still reads 20–30%. The OS doesn't see the voltage drop in time — the BMS cuts power before a clean shutdown. Running one full discharge to automatic cutoff, then a full charge without fast charging, teaches the coulomb counter where the real voltage floor sits and eliminates most spontaneous shutdowns.

SmartGuide 2 shows erratic or jumping battery percentage after swap

The fuel gauge IC in the SmartGuide 2 stores a learned discharge curve from the original cell. A new cell with a different internal impedance profile makes the IC's estimates unreliable — percentage can jump 10–15 points in either direction. The fix is one full uninterrupted discharge from 100% to automatic shutoff, followed by a full charge to 100%. After that cycle the coulomb counter resets its reference points against the actual cell and percentage reporting stabilises.

Compatible Models

SmartGuide 2 SmartGuide 210-464

Replaces Part Numbers

AHB466684

Technical Specifications

Voltage3.8V
Amp Hours3900mAh
Capacity3900mAh
Rate14.82Wh
Net Weight52g /1.83 oz
Gross Weight102g /3.60 oz
Approximate Weight102g /3.60 oz
Dimension 85.20 x 63.50 x 4.50mm

Product Highlights

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

Frequently Asked Questions

My SmartGuide 2 won't turn on at all after the replacement battery sat unused for a few months — is the battery dead?

Likely not dead, but the BMS has locked out due to deep discharge below 2.5V per cell during storage. Connect the phone to a slow 5V/1A charger and leave it for 20–30 minutes without attempting to power it on — the charge IC needs to trickle current into the cell before the BMS will re-initialise and allow normal operation. If the phone shows a charging indicator after that window, continue charging to at least 20% before booting.

Fast charging stopped working on my SmartGuide 2 the first time I plugged in after fitting this battery — is the cell faulty?

Not faulty — the USB-PD handshake between the charger and the phone's charge IC sometimes won't negotiate a fast-charge contract on the first cycle with a new cell because the BMS reports an uncalibrated state. Disconnect, wait 10 seconds, and reconnect using the original cable and charger. If fast charge still doesn't activate, complete one full standard-speed charge to 100%, then fast charging will engage normally on subsequent sessions.

The SmartGuide 2 feels warm near the battery area while charging with the new cell — is that normal?

Some warmth is expected on the first few charge cycles with a freshly installed cell. A new Li-Polymer cell starts with slightly higher internal impedance than a broken-in one, so the charge IC dissipates a little more energy as heat during the constant-current phase. If the phone becomes hot to the touch or shows a thermal warning, remove it from charge and let it cool to room temperature before reconnecting. Normal warmth — not hot — resolves within two to three full charge cycles.

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

Meder SmartGuide 2 Replacement Battery, 3.8V, 3900mAh, 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