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BL299 3300mAh 3.8V Li-ion Polymer replacement battery for Lenovo Z5s L78071, front view showing battery surface and small 2-pin connector

BL299 3300mAh 3.8V Li-ion Polymer Replacement Battery for Lenovo Z5s L78071 6.3 Inch 18W QC3.0

Original price was: $22.99.Current price is: $15.99.

🔘 BL299 3300mAh 3.8V | 🔋 Li-ion Polymer | 📱 For Lenovo Z5s L78071 6.3 Inch 18W QC3.0

8 in stock

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📦 Shipping, Warranty & After-Sales Information (Click to expand ▼)

✅ Why Our Warranty Stands Out

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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

✅ 3300mAh High Capacity – Restores full battery life for Lenovo Z5s

✅ 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: BL299
Capacity: 3300mAh / 12.54Wh
Rated voltage: 3.8V
Charge limit voltage: 4.4V
Battery type: Li-ion Polymer (Grade A cells)
Compatible with: Lenovo Z5s (L78071)
Package include: 1 x battery
Bring your Lenovo Z5s back to life with this BL299 3300mAh replacement battery. Released in December 2018, the Lenovo Z5s was a standout mid-range device featuring a 6.3-inch waterdrop display with 92% screen-to-body ratio, a sleek glass back with gradient colors, and an early triple-camera setup (16MP + 8MP + 5MP) that was ahead of its time. This Li-ion Polymer battery restores the full 3300mAh capacity for dependable all-day performance. Built with grade A cells and multi-layer safety protection against overcharge, over-discharge, and short circuits. CE, RoHS, and UN38.3 certified.
Why This Battery Matters for Lenovo Z5s Owners: The Lenovo Z5s was known for balancing performance and battery efficiency. Its Snapdragon 710 processor (10nm) and 6.3-inch IPS LCD display consume relatively low power, so a healthy 3300mAh battery easily delivers 6-8 hours of screen-on time. However, after 5-6 years of use, original batteries naturally degrade — capacity drops, the phone may shut down at 20-30% battery, or charging becomes slower. This BL299 replacement battery restores the original power experience. The Z5s also supports 18W fast charging (QC 3.0), reaching approximately 50% charge in 30 minutes — this replacement battery fully supports that capability. The phone’s lightweight design (172g) and 7.7mm thickness mean battery replacement should be done carefully to maintain the glass back’s integrity. If your Z5s now needs charging twice daily, dies during video calls, or takes much longer to charge, this BL299 battery is the solution.
Compatibility Note: Fits Lenovo Z5s (model L78071) only. Please confirm your battery model before ordering — BL299 is printed on your original battery. The Lenovo Z5s features a distinctive glass back with a vertical triple-camera arrangement and rear-mounted fingerprint sensor. This battery is NOT compatible with Lenovo Z5 (L78011), Lenovo Z5 Pro (L78031), Lenovo Z6 series, or any other Lenovo models. The Z5s uses a 3.8V rated battery with 4.4V charge limit — using a battery with different voltage specifications could damage the phone’s power management IC.

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Frequently Asked Questions

The BL299 battery for Lenovo Z5s L78071 is compatible with Lenovo Z5s (model L78071). If you need a Lenovo Z5s battery replacement for L78071, this BL299 3300mAh replacement battery is the exact match. The Lenovo Z5s features a 6.3-inch waterdrop display with 92% screen-to-body ratio, Snapdragon 710 processor, glass back with gradient colors, and a vertical triple-camera setup. For BL299 battery for Lenovo Z5s L78071, please verify your device model in Settings > About Phone. This battery is NOT compatible with Lenovo Z5 (L78011), Lenovo Z5 Pro (L78031), Lenovo Z6 Youth, or other Lenovo Z-series models. If your Z5s battery drains quickly or the phone shuts down at 20-30% remaining charge, this replacement will restore stable performance. Please check your original battery label before ordering — BL299 is printed on the battery itself.

The BL299 3300mAh battery for Lenovo Z5s has a capacity of 3300mAh (12.54Wh) and a rated voltage of 3.8V, with a charge limit voltage of 4.4V. This BL299 3.8V 3300mAh Li-ion Polymer battery is built with grade A cells and is CE, RoHS, and UN38.3 certified. For Lenovo Z5s battery life expectations, a healthy BL299 battery delivers: 6-8 hours of screen-on time for mixed usage (social media, messaging, web browsing), 8-10 hours of video playback, 20-25 hours of talk time, and approximately 10-12 hours of continuous music playback. The Z5s supports 18W fast charging (QC 3.0) — this BL299 replacement battery restores full fast charging capability, reaching about 50% charge in 30 minutes and fully charged in approximately 80-90 minutes. For Lenovo Z5s battery capacity 3300mAh performance, the phone's efficient Snapdragon 710 chipset (10nm) and 6.3-inch IPS LCD display help maximize runtime. Standby time with this battery is excellent — the Z5s can last 2-3 days with light use.

Professional Lenovo Z5s battery installation is strongly recommended. The Lenovo Z5s has a sealed glass back design that requires heating to soften adhesive — improper prying can crack the glass back. To replace Lenovo Z5s battery L78071, the technician must carefully remove the glass back without damaging the fingerprint sensor ribbon cable, then disconnect the battery connector, remove the old battery (lightly adhered), and install the new BL299 battery. For BL299 battery installation Lenovo Z5s, third-party repair shops typically charge $20-30 for labor. Lenovo official battery replacement costs vary by region. For Lenovo Z5s battery health maintenance: 1) Use a certified 18W QC 3.0 charger for optimal charging — avoid cheap chargers that may not negotiate voltage correctly. 2) Keep battery level between 20% and 80% for daily use to maximize lifespan. 3) Avoid exposing the phone to high temperatures (above 40°C / 104°F) — heat accelerates battery degradation. 4) For long-term storage (over 2 months), keep the battery at approximately 60% charge. 5) Perform a calibration cycle after installation: drain the phone until it auto-shuts off, then charge uninterrupted to 100%. This helps the system accurately report battery percentage. 6) If the battery becomes swollen, stop using immediately — swelling can crack the glass back or damage the display.

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