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KURIO 7S Tablet Compatible Battery 3.7V 4000mAh Li-Polymer PL458097

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From $30.99 USD $38.99
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Fits Kurio 7S and C1300 tablets; replaces OEM battery PL458097.
3.7V and 4000mAh capacity restores full charge cycles on tablets that shut down prematurely or show depleted fuel gauge after years of use.
Connector is a two-pin JST-style plug with keyed orientation; tabs lock into the housing slot without tools or adhesive.
We bench-tested the cell against the original Kurio fuel gauge IC — BMS accepted handshake on first insertion, voltage curve stable through full discharge.
Run one complete discharge to automatic shutoff, then charge uninterrupted to 100% to recalibrate the fuel gauge IC against the new cell and fix inaccurate percentage display.
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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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.7V

Amp

4000mAh

KURIO 7S / C1300 — 3.7V Li-Polymer Replacement Battery (PL458097)

This is a 3.7V, 4000mAh Li-Polymer battery for the KURIO 7S and C1300 kids' tablets. It replaces part number PL458097 when the original cell no longer holds a usable charge. Dimensions are 99.15 × 79.55 × 4.20 mm — measure your existing cell before ordering to confirm fitment.

  • 7S and C1300 compatibility: Both tablets share the same mainboard revision and battery bay dimensions, so a single cell covers both. The connector pinout and BMS handshake are identical across the two models.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on a KURIO mainboard. The BMS accepted the new cell without fault codes, and the charge IC reached full termination voltage cleanly.
  • Fuel gauge reset after swap: After fitting this battery, run the tablet down to automatic shutoff once, then charge uninterrupted to 100%. This recalibrates the fuel gauge IC against the new cell's actual capacity curve and clears the inaccurate percentage readings that typically appear straight after a swap.

Tablet shutting down at 15–25% after battery replacement

This is a fuel gauge calibration problem, not a faulty cell. The fuel gauge IC was trained on the old cell's discharge curve. When voltage drops under combined display and WiFi load, it hits what looks like an empty-battery floor while real capacity still exists. Run one complete discharge to automatic shutoff, then a full uninterrupted charge to 100%. After that cycle, the IC remaps its low-voltage threshold to the new cell and the phantom shutdowns stop.

KURIO tablet showing wrong battery percentage after swap

The percentage is calculated by a fuel gauge IC on the board, not the battery itself. That IC stored the old cell's capacity data and is now reading the new cell's voltage incorrectly. A single full discharge-to-shutoff followed by a full charge to 100% forces the IC to relearn the new cell's voltage-to-capacity relationship. After that cycle, percentage readings stabilise and track normally.

Compatible Models

7S C1300

Replaces Part Numbers

PL458097

Technical Specifications

Voltage3.7V
Amp Hours4000mAh
Capacity4000mAh
Rate14.8Wh
Net Weight72g /2.54 oz
Gross Weight107g /3.77 oz
Approximate Weight107g /3.77 oz
Dimension 99.15 x 79.55 x 4.20 mm

Product Highlights

  • Brand: KURIO
  • 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

The KURIO keeps switching off around 20% — is the replacement battery faulty?

The battery is not faulty. The fuel gauge IC on the tablet's board was calibrated to the old cell, so it misreads the voltage cliff on the new one and triggers a shutdown early. Run the tablet down to automatic shutoff once, then charge it uninterrupted to 100%. That single cycle recalibrates the IC and the early shutdowns stop.

Fast charging stopped working after fitting the new PL458097 — the tablet now charges slowly every time.

The charge controller needs one completed charge cycle before it confirms the new cell's internal resistance and re-enables higher charge current. Plug in with the original cable, let it run from near-empty to 100% without unplugging, and fast charge should resume on the next session. If it does not, check the cable — a USB 2.0 data cable limits current to 500mA regardless of the charger.

Battery percentage drops quickly from 100% then slows down — is the 4000mAh capacity wrong?

The capacity is correct. What you are seeing is fuel gauge drift — the IC maps percentage non-linearly because it was trained on a different cell. The top end of the curve looks steep, the middle flattens out. One full discharge to automatic shutoff followed by a complete charge to 100% re-anchors the IC's curve to this cell. After that cycle the percentage steps down at a consistent rate.

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