Choosing among FPV radios & batteries is really a compatibility decision: a Sky Viper battery set, a DJI FPV charger accessory, and a radio booster solve different problems. The useful shortcut is to identify the hardware you already own before comparing prices. Here, the four choices divide into one battery-and-charger set, two DJI charging accessories, and one 2.4G module for a DJI RC transmitter.
If you want the shortest route: choose by platform first, then by accessory role. The Sky Viper set is the battery-and-charger option; the DJI choices cover charger and hub roles; and the amplifier is a radio add-on.
Quick take
At a glance, listed prices span $12.00 to $36.80, a $24.80 gap. That range covers distinct roles rather than four versions of the same accessory: a Sky Viper battery-and-charger set, a DJI FPV AC adapter, a DJI FPV charging hub, and a 2.4G radio module for a DJI RC transmitter. Platform match should come before price; a lower-priced accessory for the wrong system does not solve the intended job.
Listed-price comparison
The table keeps the price check separate from the compatibility decision. The bars are relative to the four listed prices, with the longest bar marking the highest listed price.
| Item | Listed price | Relative price |
|---|---|---|
| Battery & Charger Set 750mAh for Sky Viper | $12.00 | |
| Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90 | $29.99 | |
| Genuine DJI FPV Battery Charging Hub | $36.80 | |
| FPV Radio Signal Booster Amplifier Module for DJI RC Transmitter | $33.73 |
Decision matrix
- Battery plus charger for named Sky Viper models: Choose the Battery & Charger Set 750mAh for Sky Viper. Its title and compatibility attribute point to the Sky Viper platform.
- AC power adapter for DJI FPV: Choose the Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90. The model phrase and charger type make its role clear.
- Multi-battery charging expansion: Choose the Genuine DJI FPV Battery Charging Hub Multiple Battery Charger Manager. It is the dedicated hub-format accessory in this comparison.
- Radio signal accessory: Choose the FPV Radio Signal Booster Amplifier Module 2.4G 2W 2000mW for DJI RC Transmitter. Its stated use is for the transmitter side, not battery charging.
Product notes
Battery & Charger Set 750mAh for Sky Viper s1700 s1750 V2400HD V2450FPV V2450GPS
The Battery & Charger Set 750mAh is the clearest match when the aircraft is one of the named Sky Viper models: s1700, s1750, V2400HD, V2450FPV, or V2450GPS. It combines the battery and charger instead of separating those two pieces, and the 750mAh capacity is stated directly. That bundled format is the reason to choose it for a Sky Viper-specific setup. The limitation is equally clear: its compatibility is framed around Sky Viper, so it is not the natural choice for a DJI FPV charging system. The set is listed as new.
Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90 25.2V 3.4A 86W
The Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90 suits a shopper looking for the named DJI FPV charger format rather than a multi-battery hub. Its model and MPN are both CDX170-90, and the title specifies 25.2V, 3.4A, and 86W; the description also says a power cord is included. Those concrete identifiers make it the focused choice for the adapter role. The trade-off is scope: it is an AC power adapter and charger, not the hub that expands charging across additional batteries. It is described as new in bulk, non-retail packaging.
Genuine DJI FPV Battery Charging Hub Multiple Battery Charger Manager
The Genuine DJI FPV Battery Charging Hub is for expanding a DJI FPV charging arrangement: when connected to a DJI FPV charger, its description says it can charge three additional batteries in sequence. That makes the hub the logical choice when the goal is multi-battery organization rather than adding a power adapter. It is identified as the FPV Charging Hub, in black, with compatibility listed for DJI FPV. The limitation is the required setup: it needs a DJI FPV charger connection to perform that expansion. It is also marked open box, so its condition differs from the new Sky Viper set and adapter.
FPV Radio Signal Booster Amplifier Module 2.4G 2W 2000mW for DJI RC Transmitter
The FPV Radio Signal Booster Amplifier Module is the radio-focused choice here. Its title names a 2.4G, 2W, 2000mW module for a DJI RC transmitter, while the description lists 11dB ±1.5dB transmitter gain, 5-15V operation, and a 36g weight. Choose it when the intended task is adding a signal-booster module to that transmitter setup, not charging a flight battery. The limitation is the installation package detail: the stated 62 × 32 × 10 mm size and 36g weight are without the antenna, mount, and power cable. It is listed as new.
Final recommendation by use case
- Sky Viper battery and charging: Choose the Battery & Charger Set 750mAh for Sky Viper. The platform wording and bundled format make the match direct.
- DJI FPV power-adapter need: Choose the Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90. Its model-specific charger description fits this role.
- DJI FPV charging expansion: Choose the Genuine DJI FPV Battery Charging Hub Multiple Battery Charger Manager. The hub wording separates it from an AC adapter.
- DJI RC transmitter radio accessory: Choose the FPV Radio Signal Booster Amplifier Module 2.4G 2W 2000mW for DJI RC Transmitter. The transmitter-specific description identifies its intended use.
The simple rule is to compare within the matching platform, not across unrelated accessory types. Match Sky Viper wording to the battery set, DJI FPV charging wording to the charger or hub, and DJI RC transmitter wording to the amplifier. Once the role is clear, the listed-price table provides the final budget check.
