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48V hidden down-tube e-bike battery, Reention EB-AG integrated frame pack, 10.4Ah/14Ah/15Ah (499/672/720Wh), Korea/Japan 18650 cells, 30A BMS, 362.5×74×99mm, 800-1000 cycles. Drop-in for Gobike FORZA JUNTOS, GlareWheel EB-AG & Fafrees FF20 Polar.
This is a 48V hidden / integrated down-tube lithium-ion battery in the Reention EB-AG frame-integrated case design, available in 10.4Ah, 14Ah and 15Ah capacities (up to 720Wh). Engineered as a drop-in replacement for the frame-integrated battery slot of GOBIKE FORZA, FORZA Mini, JUNTOS, GlareWheel EB-AG and Fafrees FF20 Polar (main down-tube slot). Built with Korea / Japan 18650 cells (2600 / 3000 / 3500 mAh), it delivers 800-1000 charge cycles and stable output through an integrated 30A BMS.
✅ GOBIKE FORZA (48V frame-integrated)
✅ GOBIKE FORZA Mini (48V frame-integrated)
✅ GOBIKE JUNTOS (integrated down-tube slot)
✅ GlareWheel EB-AG
✅ Fafrees FF20 Polar (main down-tube frame battery slot)
✅ Compatible with 48V 500W – 1000W motor systems
✅ Integrated / frame down-tube mounting
⚠️ Important: Fits the down-tube integrated frame slot only; not compatible with seat-tube or secondary battery positions (e.g. FF20 Polar seat-post battery).
| Model | Voltage | Capacity | Energy | Configuration | Weight |
|---|---|---|---|---|---|
| 10.4Ah | 48V | 10.4Ah | 499Wh | 13S4P | 3.8 kg |
| 14Ah | 48V | 14Ah | 672Wh | 13S4P | 4.2 kg |
| 15Ah | 48V | 15Ah | 720Wh | 13S5P | 4.5 kg |
✅ Drop-in Integrated Fit: Reention EB-AG hidden down-tube shell (362.5 × 74 × 99 mm) locks directly into the frame slot.
✅ Three Capacity Options: Choose 10.4Ah (499Wh), 14Ah (672Wh) or 15Ah (720Wh) — 13S4P / 13S5P builds to match your range.
✅ Premium Korea/Japan 18650 Cells: 2600 / 3000 / 3500 mAh lithium-ion cells for stable voltage and long service life.
✅ 30A Smart BMS: Over-charge, over-discharge, over-current and short-circuit protection for safe operation.
✅ 800-1000 Cycle Life: Reliable performance across years of daily commuting.
✅ 500W-1000W Motor Ready: Matched for mid-to-high-power hub drives; LED display shows battery status.
| Parameter | Value |
|---|---|
| Nominal Voltage | 48V |
| Nominal Capacity | 10.4Ah / 14Ah / 15Ah |
| Energy | 499Wh / 672Wh / 720Wh |
| Composed Type | 13S4P / 13S5P |
| Cell | Korea/Japan 18650 Li-ion (2600 / 3000 / 3500 mAh) |
| Size | 362.5 × 74 × 99 mm (14.27 × 2.91 × 3.90 in) |
| Weight | 3.8 kg / 4.5 kg |
| BMS | 30A |
| Charger | 54.6V, 2A / 3A |
| Fit Motor | 0-500W / 500-1000W |
| Cycle Life | 800-1000 Times |
| Display | LED |
| Battery Position | Integrated (down-tube) |
| Application | Electric bike |
Product Name: 48V Hidden Down-Tube E-Bike Battery
Housing: Reention EB-AG (Integrated)
Voltage: 48V
Capacity: 10.4Ah / 14Ah / 15Ah
Energy: 499Wh / 672Wh / 720Wh
Configuration: 13S4P / 13S5P
Cell: Korea/Japan 18650 Li-ion (2600 / 3000 / 3500 mAh)
Size: 362.5 × 74 × 99 mm (14.27 × 2.91 × 3.90 in)
Weight: 3.8 kg / 4.5 kg
BMS: 30A Smart BMS
Charger: 54.6V, 2A / 3A
Fit Motor: 0-500W / 500-1000W
Cycle Life: 800-1000 Times
Display: LED
Battery Position: Integrated (down-tube)
Application: Electric bike
Fit For: GOBIKE FORZA / FORZA Mini / JUNTOS, GlareWheel EB-AG, Fafrees FF20 Polar (main slot)
We specialize in mid-drive motors and e-bike parts. Strict testing, powerful R&D and flexible OEM service guarantee long-term cooperation.
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We supply genuine OEM parts and premium compatible aftermarket replacement parts for e-bikes, including motor components, controllers, throttles, PAS sensors, wiring harnesses, connectors and Bosch form-factor batteries.
We serve mainstream drive system manufacturers: Ananda, Bafang, Aikema, Tongsheng, Shengyi, Bosch and more. We also provide repair components for complete e-bike brands including Sur‑Ron, Aventon, Trek and many others.
All items are brand-new and inspected before shipment. We do not supply second-hand or refurbished goods.
Our team verifies compatibility according to your bike model, motor info or original part photos. We confirm available OEM parts or recommend workable alternative solutions.
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Sea freight, air freight and rail transport are optional.
Lead time varies by item and shipping mode. We confirm exact timelines before each order and share tracking updates.
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