Telstra R90 Tough Li3711T42P3h553457 Compatible Battery 3.7V 1200mAh
This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.
WECARE5
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.
Telstra R90 Tough Li3711T42P3h553457 Compatible Battery 3.7V 1200mAh - is backordered and will ship as soon as it is back in stock.
Let customers speak for us
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
✉ sales@batteryweb.com
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.
Telstra R90 Tough Li3711T42P3h553457 Compatible Battery 3.7V 1200mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
1200mAh
Telstra R90 Tough / T90 / T6 / T108 — 3.7V Li-ion Replacement Battery (Li3711T42P3h553457)
This is a 3.7V, 1200mAh lithium-ion battery for the Telstra R90 Tough and compatible rugged smartphone models. It replaces OEM part Li3711T42P3h553457. Fit models include the R90 Tough, T90, T6, and T108.
- R90 Tough series compatibility: The R90 Tough, T90, T6, and T108 share the same 3.7V cell format, connector pinout, and BMS handshake protocol — one battery fits all four models without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the R90 Tough platform. The BMS accepted the new cell without a protection lockout event, and charge termination triggered correctly at full voltage.
- Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This gives the fuel gauge IC a clean reference against the new cell's discharge curve before high-current charging begins on an uncalibrated cell.
Sudden shutdown at 20–30% on the R90 Tough after a cell swap
A replacement cell has a slightly different internal impedance profile than the original. Under high-load spikes — LTE modem transmission or screen brightness peaks — the cell voltage sags below the BMS cutoff threshold even when the OS reports 20–30% remaining. The fuel gauge IC is still reading from the old discharge curve it learned on the worn cell. One full uninterrupted discharge-to-charge cycle resets the coulomb counter and maps the new cell's actual voltage-to-capacity curve, eliminating the false cutoff.
USB fast charge not activating after battery replacement
On the first cycle after a cell swap, the R90 Tough's charge IC may not negotiate the fast-charge protocol with the new BMS. This happens because the BMS reports an uncalibrated state of charge, and the charge IC defaults to standard 5V/1A as a safety measure. Complete one full standard charge cycle first. After that cycle, fast charging should handshake correctly on subsequent connections.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Telstra
- Manufacturer: CS
- Series: X-Longer
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Telstra R90 Tough keeps shutting off at around 25% after I put in the new battery — what's happening?
The fuel gauge IC is still calibrated to the old cell's discharge curve, so it misreads the new cell's voltage under load. When the modem or screen pulls a current spike, the cell voltage dips below the BMS cutoff even though the displayed percentage looks fine. Run one full uninterrupted discharge down to automatic shutdown, then charge to 100% without interruption. After that cycle the coulomb counter recalibrates to the new cell and the false cutoffs stop.
The R90 Tough shows the battery percentage jumping around erratically after replacement — is the new battery faulty?
It is not a faulty cell — it is the fuel gauge IC recalibrating. The IC learned the impedance and discharge curve of the original cell over hundreds of cycles, and it takes a full reference cycle to map the new cell's behaviour accurately. Keep the phone in normal use through one complete discharge and charge without topping up mid-cycle. The percentage readings stabilise once the IC has a clean dataset for the new cell.
The phone feels warm near the battery while charging the new cell — should I be concerned?
A freshly installed cell has higher impedance than a conditioned one, so the charge IC pushes more voltage to maintain current, which generates more heat during the first few charge cycles. This is normal and reduces as the cell conditions. If the phone becomes hot to the touch rather than warm, disconnect it and check that the charge IC has not been set to a fast-charge profile — drop back to standard 5V charging for the first two cycles, then reintroduce fast charging.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Related Products
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.
-
Up to 21% offNew arrival
BatteryWeb
BQ Aquaris M5 3120 Replacement Battery 3.8V 3000mAh
0.15 lb
Sale priceFrom $26.99 USD Regular price $33.99Unit priceIn stock (51 units) -
-
Up to 21% offNew arrival
BatteryWeb
MyPhone C-Smart BM-03 Compatible Battery 3.7V 1500mAh
0.13 lb
Sale priceFrom $23.99 USD Regular price $29.99Unit priceIn stock (75 units) -
-
Up to 21% offNew arrival
BatteryWeb
GSmart Mika MX Replacement Battery 3.8V 3000mAh Li-Polymer
0.17 lb
Sale priceFrom $26.99 USD Regular price $33.99Unit priceIn stock (60 units) -
-
Up to 21% offNew arrival
BatteryWeb
BQ Aquaris X5 Compatible Battery 3.85V 2800mAh 2900
0.15 lb
Sale priceFrom $24.99 USD Regular price $30.99Unit priceIn stock (90 units) -
-
Up to 21% offNew arrival
BatteryWeb
Mobistel Cynus F10 Compatible Battery 3.8V 2300mAh
0.16 lb
Sale priceFrom $26.99 USD Regular price $33.99Unit priceIn stock (60 units) -
-
Up to 21% offNew arrival
BatteryWeb
GIONEE F105 Replacement Battery 3.8V 2300mAh BL-N2400A
0.16 lb
Sale priceFrom $26.99 USD Regular price $33.99Unit priceIn stock (60 units) -
-
Up to 21% offNew arrival
BatteryWeb
KAZAM Trooper 445L TR4L45 Compatible Battery 3.7V 1500mAh
0.12 lb
Sale priceFrom $23.99 USD Regular price $29.99Unit priceIn stock (84 units) -
-
Up to 21% offNew arrival
BatteryWeb
MyPhone Hammer Iron BM-06 Replacement Battery 3.7V 2000mAh
0.15 lb
Sale priceFrom $23.99 USD Regular price $29.99Unit priceIn stock (75 units) -
