Freefly EV Peak U4-Pro is a dual-channel 12S LiPo balancing charger for Alta X. Charge two Flight Packs simultaneously up to 800 W per channel with 10/15/20 A settings, cell balancing and storage modes, 110–240 V auto switching, plus included XT90 and 12S balance leads.
Freefly EV Peak U4-Pro Enterprise Drone Charger is a dual-channel, 12S LiPo balancing charger with an integrated power supply, purpose-built to keep Alta X flights moving. Charge two Alta X Flight Packs at once on independent channels, with adjustable current and smart safety features that protect packs and simplify fleet ops.
Setup is straightforward for the hangar or the field. The U4-Pro auto-switches between 110–240 V AC, balances cells for consistent health, and supports storage charge/discharge to prep batteries for transport or downtime. All required leads are included to charge two Alta X packs out of the box.
Two-Pack Throughput
- Dual output: charge two 12S Alta X Flight Packs simultaneously on independent channels.
- High power per channel: up to 800 W × 2 with selectable 10 A / 15 A / 20 A charge rates for time-critical turns.
- Sub-two-hour cycles: recover fully depleted packs in under two hours per channel, pack-dependent.
Smart, Safe, Consistent
- Cell balancing: balances cells for even charge; fine balance accuracy for long-term pack health.
- Protection suite: overcurrent, under-voltage, short-circuit, and reverse-polarity protections.
- Storage modes: one-button storage charge/discharge to recommended voltages.
Field-Ready Power & I/O
- Integrated AC supply: plug in anywhere with automatic 110–240 V switching (50/60 Hz).
- Service/updates: USB-Micro port for firmware updates.
- Portable form factor: about 12.25 × 9 × 5.75 in; approximately 6.75 lb.
Alta X Workflow Ready
- All cables included: XT90 charge leads and 12S balance harnesses to charge two packs immediately.
- Expandable kit: compatible with U4 balance leads and extension cables for larger benches or carts.
Freefly EV Peak U4-Pro Enterprise Drone Charger is a dual-channel, 12S LiPo balancing charger with an integrated power supply, purpose-built to keep Alta X flights moving. Charge two Alta X Flight Packs at once on independent channels, with adjustable current and smart safety features that protect packs and simplify fleet ops.
Setup is straightforward for the hangar or the field. The U4-Pro auto-switches between 110–240 V AC, balances cells for consistent health, and supports storage charge/discharge to prep batteries for transport or downtime. All required leads are included to charge two Alta X packs out of the box.
Two-Pack Throughput
- Dual output: charge two 12S Alta X Flight Packs simultaneously on independent channels.
- High power per channel: up to 800 W × 2 with selectable 10 A / 15 A / 20 A charge rates for time-critical turns.
- Sub-two-hour cycles: recover fully depleted packs in under two hours per channel, pack-dependent.
Smart, Safe, Consistent
- Cell balancing: balances cells for even charge; fine balance accuracy for long-term pack health.
- Protection suite: overcurrent, under-voltage, short-circuit, and reverse-polarity protections.
- Storage modes: one-button storage charge/discharge to recommended voltages.
Field-Ready Power & I/O
- Integrated AC supply: plug in anywhere with automatic 110–240 V switching (50/60 Hz).
- Service/updates: USB-Micro port for firmware updates.
- Portable form factor: about 12.25 × 9 × 5.75 in; approximately 6.75 lb.
Alta X Workflow Ready
- All cables included: XT90 charge leads and 12S balance harnesses to charge two packs immediately.
- Expandable kit: compatible with U4 balance leads and extension cables for larger benches or carts.
Electrical & Power
| AC input | 110–240 V~ 50/60 Hz, up to 11 A |
| Max charge power | 800 W × 2 (independent channels) |
| Max discharge power | 60 W × 2 |
Charging Performance
| Charge current (per channel) | Selectable 10 A / 15 A / 20 A |
| Discharge current (per channel) | 1,000 mA (1.0 A) |
| Cell balancing accuracy | <20 mV |
| Modes | Charge, balance charge, storage charge/discharge |
Battery Support
| Chemistry / cell count | LiPo, 12S |
| Outputs | Dual-channel (charges two 12S Alta X Flight Packs simultaneously) |
I/O & Firmware
| Update port | USB Micro |
| Leads & harnesses | XT90 charge leads; 12S balance leads (included) |
| AC cable | 110 V US-style plug (included) |
Protection & Safety
| Electrical protection | Overcurrent, under-voltage, short-circuit, reverse-polarity |
| Power supply | Integrated; automatic 110–240 V switching |
Physical
| Dimensions (L × W × H) | 12.25 × 9 × 5.75 in (312 × 228 × 145 mm) |
| Weight | 6.75 lb (3.05 kg) |
(1) Dual-channel 12S LiPo charger
(2) XT90 charging leads
(2) Balance leads for 12S Alta X batteries
(2) Balance connectors for 6S/10S/12S LiPo batteries (not 14S)
(1) AC power cable (110 V US plug)
*Batteries not included.
Supported Batteries
Freefly Alta X 12S Flight Packs (LiPo, 12S; charged via included XT90 leads and 12S balance harnesses)
Cables & Accessories
Balance Leads for U4 Charger
Power Extension Cables for U4 Charger
Power Source
110–240 V AC (50/60 Hz) mains
Not Compatible
14S LiPo batteries or packs that lack a 12S balance connection
Customer Reviews
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