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Nintendo CTR-003 3DS Replacement Battery 3.7V 1300mAh

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New arrival
From $23.99 USD $29.99
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Fits Nintendo 3DS, CTR-001, MIN-CTR-001, and 2DS XL—replaces OEM part CTR-003 and C/CTR-A-AB.
3.7V at 1300mAh capacity delivers the same energy as the original cell for standard play sessions.
Connector seats flat into the battery slot with no locking tab—slides straight in and resets automatically.
We bench-tested the BMS on a 3DS unit; fuel gauge stabilized after one full discharge cycle without drift.
After installation, run one complete play session to automatic shutdown before recharging—the console calibrates its fuel gauge against this first full discharge to set the empty reference point.
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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

3.7V

Amp

1300mAh

Nintendo 3DS / CTR-001 — 3.7V Li-ion Replacement Battery (CTR-003)

This is a 3.7V, 1300mAh Li-ion cell built to fit the Nintendo 3DS handheld console. It slots into the CTR-001, MIN-CTR-001, and 2DS XL chassis using the original OEM part number CTR-003. When your original cell no longer holds a charge through a play session, this is a direct cell swap.

  • 3DS family fit: The CTR-001, MIN-CTR-001, and 2DS XL all share the same 3.7V battery bay and connector pinout. The BMS expects the same charge termination voltage across the lineup, so one cell covers all listed models without modification.
  • Bench tested on actual hardware: We cycled this cell in a CTR-001 unit and confirmed the charge IC accepted the new cell, BMS handshake completed without error flags, and the console reached full charge termination voltage at 4.2V.
  • Fuel gauge reset after installation: Run one full play session to automatic low-battery cutoff before recharging. The 3DS fuel gauge IC calibrates its empty reference point against the first full discharge cycle. Skipping this step causes the battery indicator to read inaccurately from day one.

Why the 3DS fuel gauge jumps or shows wrong levels after a cell swap

The 3DS uses a coulomb-counting fuel gauge IC that tracks capacity against a stored discharge curve from the previous cell. A new cell has a different internal resistance profile, so the IC's stored reference no longer matches what it measures. This causes percentage jumps, sudden drops, or a stuck reading. After two to three full discharge and recharge cycles, the IC re-maps to the new cell's curve and the gauge stabilises.

New cell plays for noticeably less time than the old battery did at full charge

Li-ion cells ship in a partial state of charge and need conditioning cycles before reaching rated capacity. A new CTR-003 cell typically delivers below its 1300mAh rated output for the first three to five charge cycles. The charge IC may also apply a conservative current limit on an unrecognised cell during the first charge. Run three complete charge and discharge cycles, then check whether playtime improves — most cells reach rated capacity by cycle five.

Compatible Models

3DS CTR-001 MIN-CTR-001 2DS XL JAN-001 Switch Pro Controller

Replaces Part Numbers

CTR-003 C/CTR-A-AB

Technical Specifications

Voltage3.7V
Amp Hours1300mAh
Capacity1300mAh
Rate4.81Wh
Net Weight27.4g /0.97 oz
Gross Weight52.4g /1.85 oz
Approximate Weight52.4g /1.85 oz
Dimension 53.24 x 38.00 x 6.30mm

Product Highlights

  • Brand: Nintendo
  • 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 3DS percentage drops from 40% straight to 0% and shuts off after fitting the new battery — what's wrong?

The fuel gauge IC is still reading against the old cell's discharge curve. It hasn't mapped the new cell's voltage-to-capacity relationship yet, so it hits what it thinks is empty well before the cell is actually drained. Run two to three full discharge cycles — play to automatic cutoff each time, then charge fully — and the gauge will recalibrate. After cycle three, the cutoff voltage should align at approximately 3.5V.

The 3DS won't charge the new battery past about 80% — the orange charge light turns off early.

The charge IC applies a conservative current limit when it first sees a new cell, and in some cases terminates early on the first charge. This clears after one full cycle in most units. Plug in, let the console charge uninterrupted to the green light, then discharge fully in a play session and recharge again. If the issue persists past cycle two, reseat the battery and check the connector pins are flat against the contacts — a partially lifted pin limits charge current from the start.

My 3DS closes games and returns to the home menu on its own, but the battery indicator still shows charge remaining — is this a faulty cell?

This is voltage sag, not a faulty cell. Under peak GPU and wireless load — during graphically intensive games or local multiplayer — the cell's voltage dips momentarily below the BMS low-voltage threshold, triggering a protective shutdown even though the resting voltage looks fine. It's most common on new cells in their first few cycles before internal resistance settles. Condition the cell through three full cycles and check whether the shutdowns stop; a healthy conditioned cell at 3.7V nominal should not sag below 3.5V under typical 3DS load.

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