Samsung Galaxy Mega 6.3 B700BE Replacement Battery 3.7V 6400mAh
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Samsung Galaxy Mega 6.3 B700BE Replacement Battery 3.7V 6400mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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
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
⚠️ 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.
Samsung Galaxy Mega 6.3 B700BE Replacement Battery 3.7V 6400mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
6400mAh
Samsung Galaxy Mega 6.3 — 3.7V Li-ion Replacement Battery (B700BE)
The B700BE is a 3.7V Li-ion cell rated at 6400mAh (23.68Wh), built to fit the Samsung GT-I9200, GT-I9205, and Galaxy Mega 6.3 series. If your original cell is swelling, draining fast, or refusing to hold a charge, this is the direct swap. Dimensions are 86.90 x 64.90 x 8.90mm — confirm your battery tray before ordering.
- GT-I9200 and GT-I9205 compatibility: Both the standard and LTE variants of the Galaxy Mega 6.3 share the same battery bay geometry and connector pinout. The B700BE and B700BU part numbers cover both, so the same cell slots into either without modification.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a GT-I9200 unit. The BMS communicated cleanly with the charge IC, and the protection circuit tripped correctly at the low-voltage cutoff threshold — no runaway, no false full-charge termination.
- First-cycle fuel gauge reset: On first use after installation, disable fast charging and run one complete discharge-charge cycle from 100% down to auto-shutoff, then back to full. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before any high-current charging session.
Why the Galaxy Mega 6.3 reports wrong battery percentage after a cell swap
The Galaxy Mega 6.3 uses a fuel gauge IC that builds its charge estimate from a learned discharge curve stored against the old cell. When a new cell goes in, that curve no longer matches reality — so the reported percentage drifts from the actual state of charge. This is why phones can jump from 40% to 5% without warning, or show 100% while the phone still shuts down under load. One full uninterrupted discharge-charge cycle forces the IC to relearn the curve against the new cell. After that cycle, percentage accuracy stabilises.
Sudden shutdown at 20–30% on the replacement cell
This happens when the cell voltage drops sharply under the combined load of the modem radio and display — even though the fuel gauge still reads a safe percentage. The GT-I9200's processor triggers an emergency shutdown when it sees voltage fall below roughly 3.4V under load, regardless of the displayed number. A new cell that hasn't completed a calibration cycle will hit this voltage cliff earlier than expected. Run one full discharge to auto-shutoff and charge to 100% without interruption — the fuel gauge recalibrates and the shutdowns stop.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Samsung
- Manufacturer: CS
- Series: Extension
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Galaxy Mega 6.3 won't turn on after the new battery sat in a drawer for a few months — is the cell dead?
Probably not dead, but the BMS has locked out due to deep discharge. Li-ion protection circuits cut power when cell voltage drops below around 2.5V, which can happen over weeks of self-discharge in storage. Plug the phone into a wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing the power button. The charge IC will trickle current into the cell until voltage climbs above the BMS re-enable threshold, typically 3.0V, at which point the phone will boot normally.
Fast charging isn't working on my GT-I9200 after fitting this battery — it just charges slowly every time.
On the first charge cycle after a cell swap, the phone's charge IC defaults to a conservative current profile while it handshakes with the new BMS. Samsung's adaptive charging protocol won't step up to high-current mode until it receives a valid response from the battery's protection circuit across at least one full cycle. Let the first charge run to 100% on standard charge, then discharge to auto-shutoff. On the second cycle, fast charging re-enables automatically.
The battery percentage on my Galaxy Mega 6.3 keeps jumping around erratically — goes up and down without me doing anything.
The coulomb counter inside the fuel gauge IC is still using calibration data from the original cell. A new cell with a different internal resistance profile causes the IC to miscalculate state-of-charge in real time, producing the erratic jumps. This isn't a fault with the cell itself. Perform one uninterrupted discharge from 100% down to automatic shutoff, then charge straight back to 100% — the IC writes a new reference curve and the percentage stabilises within that single cycle.
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