Choosing among FPV radios & batteries is less about picking the biggest number and more about matching the job: a Sky Viper battery-and-charger set, a DJI power adapter, a multi-battery hub, or a 6S pack with the right connector. Start with the aircraft and charging setup, then compare price and format. A charger, charging hub, and flight battery serve different roles, so the lowest price is not automatically the simplest choice.
Quick take
- Named Sky Viper models: The Battery & Charger Set 750mAh is the focused choice when your aircraft matches the Sky Viper models in its title.
- DJI FPV AC power: The CDX170-90 is the relevant format when you need a DJI FPV battery charger AC power adapter.
- Sequential charging expansion: The DJI FPV Battery Charging Hub is designed to connect to a DJI FPV charger and handle additional batteries in sequence.
- 6S battery pair: The HRB XT90 pack is the choice when the listed 6S, 22.2V, and connector details match the RC setup.
Listed-price comparison
The listed prices span an absolute $81.99, from USD 12.00 to USD 93.99. The bars give a quick visual position within that four-item range.
| Product | Listed price | Price bar |
|---|---|---|
| Sky Viper 750mAh battery and charger set | USD 12.00 | |
| DJI CDX170-90 AC power adapter | USD 29.99 | |
| DJI FPV Battery Charging Hub | USD 36.80 | |
| HRB 2-pack 4000mAh 6S XT90 batteries | USD 93.99 |
Decision matrix
- Choose by named aircraft: The Sky Viper set is the natural starting point because its title names s1700, s1750, V2400HD, V2450FPV, and V2450GPS models.
- Choose by adapter role: The DJI CDX170-90 separates itself through its AC power adapter format, model number, power cord, and 100-240V input.
- Choose by charging workflow: The DJI hub suits a DJI FPV setup where sequential charging and expansion from an existing DJI FPV charger matter.
- Choose by battery specification: The HRB pair is the relevant route for a setup requiring the stated 6S, 22.2V, 4000mAh, and Amass XT90 female plug details.
Product notes
Battery & Charger Set 750mAh for Sky Viper s1700 s1750 V2400HD V2450FPV V2450GPS
This is a direct match when the named aircraft is one of the Sky Viper s1700, s1750, V2400HD, V2450FPV, or V2450GPS models. The set combines a 750mAh battery with a charger, addressing both parts of a model-specific purchase in one package. Its limitation is scope: the compatibility language is tied to those Sky Viper models, so it is not the natural choice for a DJI charging setup or an XT90-connected 6S battery. Choose it for a Sky Viper-focused need where the listed model names align. The USD 12.00 price also makes it the least expensive entry in this comparison, but its role remains specialized.
Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90 25.2V 3.4A 86W
The CDX170-90 targets a straightforward power-adapter need. Its title identifies it as a DJI FPV drone battery charger AC power adapter, and the description includes a power cord. The listed electrical details are 25.2V, 3.4A, and 86W, with 100-240V input, giving useful identifiers for matching the adapter role. The limitation is function: it is a charger accessory rather than a flight battery or a hub for expanding multiple-battery charging. Choose it when the CDX170-90 model phrase and DJI FPV format match your setup. A battery-pack or sequential-charging need points to a different category of accessory here.
Genuine DJI FPV Battery Charging Hub Multiple Battery Charger Manager
This hub fits a charging-expansion need within the DJI FPV ecosystem. The description says it connects to a DJI FPV charger and can charge three additional batteries in sequence, while the title identifies the item as a Battery Charging Hub. That makes its role distinct from the CDX170-90 AC power adapter. The tradeoff is the open-box condition, and the hub depends on a DJI FPV charger rather than functioning as a flight battery. Pick it when sequential charging expansion is the goal and a compatible DJI FPV charger is already part of the setup. Choose another format when the purchase calls for a battery or standalone AC adapter instead.
2pcs HRB XT90 4000mAh 6S Lipo Battery 100C 22.2V for RC Drone Helicopter Car FPV
The HRB pair is the dedicated flight-battery choice for a setup calling for the listed 6S, 22.2V, 4000mAh format and an Amass XT90 female plug. It also lists a 7PINS JST-XH balance connector, 100C continuous discharge, and 200C burst rate, providing several concrete identifiers for a match. The limitation is physical and electrical matching: the description says voltage, dimensions, and plug must align, and the listed size is 135×42×49mm. At USD 93.99, it also sits at the top of the comparison's price range. Choose it when those details suit the RC model, rather than treating its capacity or discharge figures as a universal advantage.
Final recommendations by use case
- Sky Viper model match: Choose the Battery & Charger Set 750mAh when one of the named Sky Viper models is the target and a combined battery-and-charger set is useful.
- DJI FPV adapter need: Choose the Genuine DJI FPV Drone Battery Charger AC Power Adapter CDX170-90 for its specific adapter role and model phrase.
- DJI FPV charging expansion: Choose the Genuine DJI FPV Battery Charging Hub when sequential charging from a DJI FPV charger is the priority.
- 6S LiPo battery pair: Choose the HRB XT90 pair when the setup matches the 6S, 22.2V, and XT90 details.
The practical decision is role-first: match the aircraft or charging ecosystem before comparing the dollar amount. The $81.99 spread separates the Sky Viper set from the HRB pair, but price alone cannot resolve charger-versus-battery compatibility.
