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5000mAh 108Wh High Capacity Replacement Battery for JBL PartyBox Stage 520 720 Portable Bluetooth Speaker FG2CELL21700
5000mAh 108Wh High Capacity Replacement Battery for JBL PartyBox Stage 520 720 Portable Bluetooth Speaker FG2CELL21700
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Genuine High-Capacity 21.6V 108Wh Rechargeable Battery Pack | Premium Power Upgrade for JBL PartyBox Stage 520 & 720 Portable Speakers (Model FG2CELL21700)
Power the Party Longer – The Ultimate Energy Upgrade for Your Sound System
Unleash the true marathon potential of your JBL PartyBox. This Genuine High-Capacity Rechargeable Battery Pack is the engineered power solution designed to replace and surpass the original cell in your JBL PartyBox Stage 520 and Stage 720 portable speakers. With an upgraded 5000mAh capacity delivering a substantial 21.6V and 108Wh of energy, this battery is built to extend your playtime dramatically, ensuring the music, lights, and energy never fade before the party does.
Why settle for standard runtime when you can command an encore? Unlike generic alternatives, this pack is designed with the exact voltage profile and smart communication protocol your PartyBox requires for safe operation, stable power delivery to high-output amplifiers, and accurate battery level indication on the speaker's panel. The inclusion of a convenient Type-C charging port modernizes the refueling process, offering faster, more versatile charging options. It's the smart, high-value investment for serious entertainers who demand reliable, extended performance from their sound system.
Why This High-Capacity Battery is Your Party's Best Investment
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Guaranteed Extended Playtime & Stable Performance: The precise 21.6V output matches the speaker's power architecture, ensuring the amplifiers receive consistent voltage for clean, undistorted sound at any volume. The 108Wh (5000mAh) capacity provides significantly more energy than many standard replacements, translating to hours of additional playback for festivals, pool parties, or all-night events.
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Seamless Integration & Modernized Charging: Designed as a direct compatible upgrade for model FG2CELL21700, it ensures a perfect fit and proper communication with the speaker's management system. The integrated Type-C charging port offers greater convenience and faster recharge cycles compared to older barrel plug designs, getting you back to the party quicker.
-
Superior Build Quality & Safety for Peace of Mind: Constructed with high-grade 21700 lithium-ion cells (where applicable) and a robust Battery Management System (BMS). It provides comprehensive protection against overcharge, over-discharge, short circuits, and overheating. This built-in safety and enhanced cycle life offer far greater long-term value and reliability than untested, low-cost alternatives.
Product Highlights
-
High-Capacity Upgrade: 5000mAh capacity, delivering 21.6V / 108Wh of total energy for extended runtime.
-
Direct Compatibility: Genuine replacement/upgrade for the JBL PartyBox Stage 520 & 720 battery (model FG2CELL21700).
-
Modern Type-C Charging: Features a built-in USB Type-C input port for convenient and fast recharging.
-
Intelligent Power Management: Integrated BMS ensures safe operation, cell balancing, and accurate performance.
-
Premium Cell Construction: Utilizes reliable, high-energy-density lithium-ion cells for durability and power.
Ready to Become the Last Sound Standing?
Don't let a dead battery end the celebration. Upgrade to lasting power. Click to order this high-capacity, genuine-compatible battery today and ensure your JBL PartyBox delivers uninterrupted, powerful sound that keeps the energy alive from the first track to the last.
Description of Product
Battery Capacity: 21.6V 5000mAh/108WH
Battery Condition: Whole Brand New
Battery Type: Lithium Ion
Compatible for Machine Model:
for PartyBox Stage 520 720 Model FG2CELL21700 Portable Bluetooth Speaker
Genuine High-Capacity 21.6V 108Wh Rechargeable Battery Pack | Premium Power Upgrade for JBL PartyBox Stage 520 & 720 Portable Speakers (Model FG2CELL21700)
Power the Party Longer – The Ultimate Energy Upgrade for Your Sound System
Unleash the true marathon potential of your JBL PartyBox. This Genuine High-Capacity Rechargeable Battery Pack is the engineered power solution designed to replace and surpass the original cell in your JBL PartyBox Stage 520 and Stage 720 portable speakers. With an upgraded 5000mAh capacity delivering a substantial 21.6V and 108Wh of energy, this battery is built to extend your playtime dramatically, ensuring the music, lights, and energy never fade before the party does.
Why settle for standard runtime when you can command an encore? Unlike generic alternatives, this pack is designed with the exact voltage profile and smart communication protocol your PartyBox requires for safe operation, stable power delivery to high-output amplifiers, and accurate battery level indication on the speaker's panel. The inclusion of a convenient Type-C charging port modernizes the refueling process, offering faster, more versatile charging options. It's the smart, high-value investment for serious entertainers who demand reliable, extended performance from their sound system.
Why This High-Capacity Battery is Your Party's Best Investment
-
Guaranteed Extended Playtime & Stable Performance: The precise 21.6V output matches the speaker's power architecture, ensuring the amplifiers receive consistent voltage for clean, undistorted sound at any volume. The 108Wh (5000mAh) capacity provides significantly more energy than many standard replacements, translating to hours of additional playback for festivals, pool parties, or all-night events.
-
Seamless Integration & Modernized Charging: Designed as a direct compatible upgrade for model FG2CELL21700, it ensures a perfect fit and proper communication with the speaker's management system. The integrated Type-C charging port offers greater convenience and faster recharge cycles compared to older barrel plug designs, getting you back to the party quicker.
-
Superior Build Quality & Safety for Peace of Mind: Constructed with high-grade 21700 lithium-ion cells (where applicable) and a robust Battery Management System (BMS). It provides comprehensive protection against overcharge, over-discharge, short circuits, and overheating. This built-in safety and enhanced cycle life offer far greater long-term value and reliability than untested, low-cost alternatives.
Product Highlights
-
High-Capacity Upgrade: 5000mAh capacity, delivering 21.6V / 108Wh of total energy for extended runtime.
-
Direct Compatibility: Genuine replacement/upgrade for the JBL PartyBox Stage 520 & 720 battery (model FG2CELL21700).
-
Modern Type-C Charging: Features a built-in USB Type-C input port for convenient and fast recharging.
-
Intelligent Power Management: Integrated BMS ensures safe operation, cell balancing, and accurate performance.
-
Premium Cell Construction: Utilizes reliable, high-energy-density lithium-ion cells for durability and power.
Ready to Become the Last Sound Standing?
Don't let a dead battery end the celebration. Upgrade to lasting power. Click to order this high-capacity, genuine-compatible battery today and ensure your JBL PartyBox delivers uninterrupted, powerful sound that keeps the energy alive from the first track to the last.
Description of Product
Battery Capacity: 21.6V 5000mAh/108WH
Battery Condition: Whole Brand New
Battery Type: Lithium Ion
Compatible for Machine Model:
for PartyBox Stage 520 720 Model FG2CELL21700 Portable Bluetooth Speaker
| Battery Capacity | 5000mAh/108WH |
| Voltage | 21.6V |
| Model No | PartyBox 520 |
| Warranty | 12 Months |
🔋 Lithium-Ion Battery Conditioning
For optimal electrochemical performance, new lithium-ion batteries should undergo 2–3 complete charge and discharge cycles before reaching full capacity.
This stabilization phase allows the internal cell chemistry to achieve balanced ion distribution, ensuring maximum runtime, stable voltage output, and extended cycle life.
After this initial conditioning period, no further full discharge cycles are required.
🛡 Premium Warranty Protection
- 12-Month Limited Manufacturer Warranty
- Up to 30-Day Return Guarantee (Policy Based)
- Replacement for defective or misrepresented items
- Dedicated customer service response within 24 hours
🚚 Professional Shipping Standards
- Orders placed Monday–Friday are processed within 1–2 business days. Orders placed on weekends are processed the following Monday.
- Tracking information appears in your order within 1–2 business days after dispatch.
- Transit time varies by region and logistics carrier
- Please verify your shipping address before order confirmation
- Address changes are not possible once shipment is dispatched
📌 Product-Specific Notice
📩 Customer Care Commitment
We are committed to delivering professional-grade battery solutions and responsive after-sales service. If you experience any issues, please contact our support team before leaving feedback.
✓ Safety & Quality Assurance
- Built-in protection against overcharging, overheating, and short circuits.
- Shipped in compliance with IATA regulations for lithium batteries.
- Compatible with OEM chargers. No firmware modification required.
Questions about compatibility? Contact us with your device model number before ordering.
Cao Chuanping
Power Systems Consultant · 8+ years in replacement battery sourcing & evaluation · View profile →
All batteries sold on accessories-mall.com are replacement parts. accessories-mall.com doesn't affiliate with any of the original manufacturers. Any registered trademarks or model names listed above are identified as purposes of showing compatibility only.
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