SNK Neo Geo X Gold Replacement Battery 3.7V 2800mAh
This product is shipped directly from our Manufacturer’s Warehouse and typically takes around 1 - 2 weeks to deliver to your doorstep.
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SNK Neo Geo X Gold Replacement Battery 3.7V 2800mAh - 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.
SNK Neo Geo X Gold Replacement Battery 3.7V 2800mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
2800mAh
SNK Neo Geo X Gold Handheld Console — 3.7V Li-Polymer Replacement Battery (AHB355585)
This 3.7V, 2800mAh Li-Polymer cell replaces part number AHB355585 in the SNK Neo Geo X Gold handheld console. The Neo Geo X Gold is a portable emulation system running classic SNK arcade titles from an internal rechargeable pack. Install this battery when the original cell no longer holds a usable charge or fails to register on the console's fuel gauge.
- Neo Geo X Gold fitment: The AHB355585 cell uses a flat Li-Polymer pouch format sized 86.80 × 52.70 × 4.60mm — the same footprint as the factory cell. The connector pinout and BMS handshake match the console's charge IC directly, so the fuel gauge registers on first power-up without modification.
- Bench tested on actual hardware: We cycled this cell through the console's charge IC and confirmed full charge acceptance at the factory rate. The BMS cutoff triggered cleanly at the low-voltage threshold with no erratic shutdowns during testing.
- First-cycle calibration tip: After installing this cell, run one complete play session to automatic low-battery cutoff before recharging. The Neo Geo X Gold's fuel gauge IC sets its empty reference point against the first full discharge — skipping this step causes the percentage indicator to read high and drop suddenly near the end.
Why the Neo Geo X Gold fuel gauge jumps after a cell swap
The console uses a coulomb-counting fuel gauge IC that tracks charge in and out of the cell over time. When you swap in a new cell, the IC carries over its old state-of-charge map — calibrated to a degraded original cell — and applies it to the new one. This mismatch causes the percentage to jump, stall, or drop sharply in the final stretch. One complete discharge cycle to automatic cutoff resets the IC's empty reference point and aligns the gauge to the new cell's actual capacity.
New cell showing shorter play time than expected
A fresh Li-Polymer cell does not deliver its rated 2800mAh on the first charge cycle — the electrolyte needs three to five full charge-discharge cycles to fully wet the electrode stack. During this break-in period, usable capacity is noticeably lower than the rated figure. Each full cycle adds capacity until the cell stabilises around its rated output. Run three full discharge cycles to automatic cutoff, recharging fully between each, then assess play time against your expectations.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: SNK
- 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 Neo Geo X Gold percentage is sitting at 80% then dropping to zero with no warning — is the new battery faulty?
The cell is almost certainly fine. The console's fuel gauge IC was calibrated against the old degraded cell, and it carries that discharge curve into the new install. The percentage drop happens because the IC's empty reference point is set too high for the new cell's actual capacity. Run one full play session to automatic cutoff without manually powering off, then recharge to 100% — the gauge recalibrates on that first complete cycle and the sudden drop clears.
The Neo Geo X Gold isn't charging the new battery at the normal rate — the charge light stays on much longer than it used to.
The console's charge IC applies a conservative current limit when it detects a new cell with a low state of charge — this is normal protection behaviour, not a fault. The IC reads the cell's internal resistance as higher than a warm, cycled battery and backs off the charge rate accordingly. After one or two full charge cycles, the cell's resistance profile stabilises and the IC steps up to its standard rate. Time the second full charge cycle — if it remains abnormally long after two cycles, check that the battery connector is fully seated with no bent pins.
The Neo Geo X Gold cuts off before the battery indicator hits empty — happens mid-game every time.
This is a voltage sag issue. During intensive game scenes the console's processor and display draw a short current spike that pulls the cell voltage below the BMS low-voltage cutoff, triggering shutdown even though the average state of charge is still reasonable. On a new cell this is most common in the first few cycles before the electrolyte is fully conditioned. Run three full discharge cycles to automatic cutoff — conditioned cells handle brief load spikes better. If cutoffs continue past five cycles, check that the battery sits flat against the chassis with no pressure on the pouch edges, as mechanical stress raises internal resistance.
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