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BL-49ST 5000mAh 3.85V Li-ion Polymer replacement battery for TECNO SPARK 10 Pro KI5k and SPARK 10C, front view showing battery surface and small 2-pin connector
BL-49ST 5000mAh 3.85V replacement battery for TECNO SPARK 10 Pro and SPARK 10C KI5k, back view showing model number BL-49ST, capacity 5000mAh, and voltage 3.85V on spec label

BL-49ST 5000mAh 3.85V Li-ion Polymer Replacement Battery for TECNO SPARK 10 Pro SPARK 10C KI5k 18W Fast Charging

Original price was: $24.99.Current price is: $16.99.

🔘 BL-49ST 5000mAh 3.85V | 🔋 Li-ion Polymer | 📱 For TECNO SPARK 10 Pro / SPARK 10C KI5k 18W Fast Charging

8 in stock

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SKU: BL-49ST Category: Tags: , , , , ,
📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

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Compare✅ Qingsm Tech⚠️ eBay / AliExpress
Warranty Period90 days from delivery15-30 days from order confirmation
When It Starts📦 Upon delivery⚠️ Upon order confirmation (even before you receive it)
Claims HandlingWe do it directly — email usAutomated dispute system, seller dependent
After Window ExpiresStill can contact us for supportNo recourse, seller can ignore you

🔋 90-day warranty is the industry standard for replacement batteries. Batteries naturally lose capacity over time — this normal wear is not covered. Warranty applies to manufacturing defects only.

📦 Shipping Cost & Delivery Time (Economy Shipping from China)

📦 Note: Batteries are classified as hazardous goods and must be shipped via specialized channels, which may take slightly longer than standard couriers. Delivery times are estimates and may be affected by customs, weather, or other unforeseen circumstances. If your country is not listed in the table below, we are currently unable to ship batteries to that destination.

DestinationFreight (USD)Est. Delivery Time
United States$7.808–15 days
Canada$6.8018–30 days
Mexico$10.0030–60 days
Germany, France, United Kingdom, Greece$6.5018–30 days
Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovakia, Spain, Sweden, Switzerland$8.0018–30 days
Croatia, Finland, Lithuania, Latvia, Slovenia$8.0030–50 days
Bulgaria, Romania$14.0030–50 days
South Korea, Japan, Australia, New Zealand, Israel, Malaysia, Singapore, Thailand, Philippines, Kazakhstan$7.5018–30 days
United Arab Emirates, Saudi Arabia, Vietnam, Chile, Peru, Colombia, Brazil$18.0025–60 days

🇧🇷 Note for Brazil: Brazilian customs can occasionally cause delays of up to 80 days or more. And please indicate the recipient's CPF, as it is required for Brazilian customs and shipping. Thanks! We appreciate your understanding.

🇪🇺 Note for EU countries: Due to new EU customs regulations effective July 1, 2026, a flat tariff fee of $6.00 (approx. €5.20) applies to shipments to EU countries. This fee covers customs tariff, handling, and payment processing costs, and will be added at checkout. Thank you for your understanding.

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Description

✅ Condition: Brand New – Never used, factory-tested quality

✅ 5000mAh High Capacity – Restores full all-day battery life for SPARK 10 Pro and SPARK 10C

✅ CE / RoHS / UN38.3 Certified

✅ 90-Day Warranty from delivery – Longer coverage than major platforms

✅ Ships in 3-7 days with tracking

🛡️ Shipping Protection Available at Checkout

✅ PayPal Buyer Protection included

✅ 100% Compatibility Guarantee – If it doesn’t fit, we’ll refund you. No questions asked.

⚠️ Low Stock Alert: Only 8 left in stock. Order now to avoid waiting.

Battery model: BL-49ST
Capacity: 5000mAh / 19.25Wh
Rated voltage: 3.85V
Charge limit voltage: 4.4V
Battery type: Li-ion Polymer (Grade A cells)
Compatible with: TECNO SPARK 10 Pro (KI5k), TECNO SPARK 10C (KI5k)
Package include: 1 x battery
Bring your TECNO SPARK 10 Pro or SPARK 10C back to life with this BL-49ST 5000mAh replacement battery. Released in 2023, the SPARK 10 series became one of TECNO’s best-selling lineups in Africa, Southeast Asia, Latin America, and the Middle East. Both the SPARK 10 Pro and SPARK 10C share the same BL-49ST battery and the “KI5k” platform — featuring a large 6.8-inch display, dual speakers, and the massive 5000mAh battery that made these phones legendary for battery life. This Li-ion Polymer battery restores the full 5000mAh capacity, giving you back the 2-day battery life that SPARK 10 users love. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Why 5000mAh Matters — And Why Your Original Battery Has Degraded: The TECNO SPARK 10 series was designed for users who need reliable all-day power — often in regions where access to charging is less frequent. The 5000mAh battery was the phone’s headline feature, delivering 2 days of moderate use or 10+ hours of video playback on a single charge. However, after 2-3 years of daily use, the original BL-49ST battery has likely degraded significantly. Common signs include: battery draining noticeably faster than when the phone was new, the phone struggling to make it through a full day, needing to charge by early evening, the device shutting down at 15-20% battery remaining, or taking longer to charge fully. This replacement battery restores the original 5000mAh capacity — one of the largest batteries ever put in a mainstream mid-range phone. For SPARK 10 owners who rely on their phone for work, communication, and entertainment throughout the day, a battery replacement is far more economical than buying a new phone.
Compatibility Note: Fits TECNO SPARK 10 Pro (KI5k) and TECNO SPARK 10C (KI5k). Please confirm your battery model before ordering — BL-49ST is printed on your original battery. Both the SPARK 10 Pro and SPARK 10C use identical batteries despite different camera and RAM configurations. This battery is NOT compatible with SPARK 9 series, SPARK 10 5G (different battery), SPARK 20 series, or TECNO CAMON series. The SPARK 10 series uses a 3.85V rated voltage with 4.4V charge limit — using a battery with different voltage specifications may cause charging issues or inaccurate battery percentage reporting.

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Frequently Asked Questions

The BL-49ST battery for TECNO SPARK series is compatible with TECNO SPARK 10 Pro (KI5k) and TECNO SPARK 10C (KI5k). If you need a TECNO SPARK 10 Pro battery replacement or a TECNO SPARK 10C battery replacement, this BL-49ST 5000mAh replacement battery is the exact match. Both phones share the same "KI5k" platform and identical battery design. The SPARK 10 Pro features a 6.8-inch 90Hz display and 50MP main camera, while the SPARK 10C offers a 6.6-inch display and 13MP camera — but both use the same BL-49ST battery. For BL-49ST battery for SPARK 10 Pro KI5k compatibility, please verify your device model in Settings > About Phone. This battery is NOT compatible with SPARK 9 series, SPARK 10 5G (which uses a different battery for 5G modem power demands), SPARK 20 series, or TECNO CAMON 20/30 series. If your SPARK 10 Pro or SPARK 10C battery drains quickly or shuts down when the indicator shows remaining charge, this BL-49ST replacement battery will restore full 5000mAh performance.

The BL-49ST 5000mAh battery for TECNO SPARK 10 Pro and SPARK 10C has a typical capacity of 5000mAh (19.25Wh) and a rated voltage of 3.85V, with a charge limit voltage of 4.4V. This BL-49ST 3.85V 5000mAh Li-ion Polymer battery is built with grade A cells and is CE, RoHS, and UN38.3 certified. For TECNO SPARK 10 Pro battery life expectations, a fresh BL-49ST delivers approximately: 2 full days of moderate use (calls, messaging, social media), 10-12 hours of continuous video playback on the large display, 8-10 hours of web browsing, 7-9 hours of gaming, and 15-20 days of standby time. The SPARK 10 series supports 18W fast charging — reaching approximately 50% charge in 35 minutes and a full 100% charge in about 90-100 minutes. For SPARK 10C 5000mAh charging speed, results are identical since both phones share the same battery and charging circuitry. The large 5000mAh capacity was the standout feature of the SPARK 10 series, offering significantly better battery life than most competitors in the same price range. When replacing an aging original battery, users typically notice immediate improvement in how long the phone lasts and a return to 2-day usage between charges.

Professional TECNO SPARK 10 Pro battery installation is recommended. Both the SPARK 10 Pro and SPARK 10C have sealed plastic backs that require heating to soften adhesive. To replace SPARK 10 Pro battery KI5k or replace SPARK 10C battery, the back cover must be carefully pried open without cracking the plastic. The battery sits beneath a plastic mid-frame bracket and has a small 2-pin connector. For BL-49ST battery installation SPARK 10 series, the battery is lightly adhered with pull tabs for easy removal — one of the more user-friendly designs. However, the phone's large 6.8-inch display is fragile, so caution is needed. Third-party repair shops typically charge $15-25 for labor. TECNO official battery replacement costs vary by region, typically $15-30. For TECNO SPARK battery health maintenance: 1) Use only a certified 18W charger that supports the phone's charging protocol — avoid cheap uncertified chargers. 2) Keep battery level between 20% and 80% for daily use to maximize the lifespan of the 5000mAh cell. 3) Avoid exposing the phone to high temperatures (above 40°C / 104°F) — the large battery is more susceptible to heat degradation. 4) For long-term storage (over 2 months), keep the battery at approximately 60% charge. 5) Perform a full calibration cycle after installation: drain the phone until it auto-shuts off (the 5000mAh battery will take a while), then charge uninterrupted to 100%. For SPARK 10 Pro battery care tips, this calibration helps HiOS (TECNO's Android skin) accurately report battery percentage. Stop using immediately if the battery shows any swelling — a swollen 5000mAh battery can deform the phone's frame.

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