Choosing among FPV radios & batteries gets tricky when the choices cover completely different jobs: a Sky Viper battery-and-charger set, a DJI AC adapter, a DJI charging hub, and a two-pack of EC5 LiPo batteries. Start with the hardware task, not just the accessory name. A charger cannot replace a flight pack, and a hub needs a charger to perform its expansion role.
Quick take
- Named Sky Viper aircraft: Choose the Battery & Charger Set 750mAh for Sky Viper.
- DJI FPV wall-powered charging: Choose the Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90.
- Sequential charging for additional DJI FPV batteries: Choose the Genuine DJI FPV Battery Charging Hub.
- Two FPV-oriented battery packs: Choose the 2x HRB 5200mAh 4S 14.8V EC5 LiPo Battery.
The listed prices span $12.00 to $79.99, creating a $67.99 spread. That difference reflects the distinct package types here; it does not establish a performance ranking.
Listed-price comparison
| Product | Listed price | Price bar |
|---|---|---|
| Sky Viper battery set | $12.00 | |
| DJI CDX170-90 AC adapter | $29.99 | |
| DJI FPV charging hub | $36.80 | |
| HRB 4S EC5 battery two-pack | $79.99 |
Decision matrix
- Replacement set for a named Sky Viper model: The Sky Viper battery-and-charger set directly names the s1700, s1750, V2400HD, V2450FPV, and V2450GPS families.
- A dedicated DJI FPV charging input: The CDX170-90 adapter supplies the AC adapter format and includes a power cord.
- A multi-battery DJI FPV workflow: The charging hub connects to a DJI FPV charger and handles three additional batteries in sequence.
- A pair of EC5-connected LiPo packs: The HRB package is identified as 2x, 4S, 14.8V, and EC5.
Product notes
Battery & Charger Set 750mAh for Sky Viper
The Battery & Charger Set 750mAh for Sky Viper is the clearest match for an s1700, s1750, V2400HD, V2450FPV, or V2450GPS owner who needs both pieces together. The set pairs a charger with a high-discharge, high-power battery, and its $12.00 listed price is the lowest in the comparison. The limitation is scope: the named compatibility is Sky Viper, and the capacity is 750mAh, so the set is not a general answer for someone seeking a standalone 4S or 6S pack. Choose it for the named aircraft family; a DJI charging accessory or two-pack LiPo serves a different task.
Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90
When the need is a wall-powered charging connection for DJI FPV, the Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90 is the focused choice. Model CDX170-90 is named directly, and a power cord is included. The title also gives concrete electrical labels-25.2V, 3.4A, and 86W-for matching against the intended charging setup. Its limitation is function: it is an AC power adapter and charger, not a battery pack or a multi-battery charging hub. It fits the charging-input job, but not a need for added flight capacity or sequential battery management.
Genuine DJI FPV Battery Charging Hub Multiple Battery Charger Manager
The Genuine DJI FPV Battery Charging Hub Multiple Battery Charger Manager is for expanding an existing DJI FPV charging setup. Connected to a DJI FPV charger, it can charge three additional batteries in sequence, making its role distinct from the CDX170-90 AC adapter. The hub is identified for DJI FPV and uses the FPV Charging Hub model name. The limitation is dependency: it requires a DJI FPV charger rather than standing alone as the power source. It is also marked open box, so its condition differs from the new-condition charger and Sky Viper set.
2x HRB 5200mAh 4S 14.8V EC5 LiPo Battery for RC Truck Helicopter Airplane FPV
The 2x HRB 5200mAh 4S 14.8V EC5 LiPo Battery is the battery-focused pick for shoppers who want two FPV-oriented packs in one package. It specifies 5200mAh capacity, 4S configuration, 14.8V per pack, EC5 connectors, a 100C continuous discharge rate, and CE and ROHS certificates. The limitation is format: 4S is the stated configuration, so it should not be treated as a 6S pack. It also sits at the top of the comparison's $67.99 price spread, making the purchase decision materially different from the $12.00 Sky Viper set.
Final recommendation by use case
For a named Sky Viper aircraft, select the Battery & Charger Set 750mAh for Sky Viper because it combines the battery and charger and names several Sky Viper models. For DJI FPV wall charging, choose the CDX170-90 adapter because its model number and included power cord make its role clear. For sequential charging of additional DJI FPV batteries, choose the charging hub, provided a DJI FPV charger is already part of the setup. For two EC5 LiPo packs, choose the HRB package. If 6S is a hard requirement, the HRB choice is marked 4S 14.8V, so it does not meet that stated format.
