1S Whoop Battery Connectors: BT2.0, A30, PH2.0, NX69, EM2.0 — What Fits What
Short version: BT2.0 and A30 are cross-compatible, so a BT2.0 fleet covers A30 whoops like the Mobula6 2024 and Caddx Curve Micro 16. NX69 accepts PH2.0 plugs, not BT2.0. EMAX's EM2.0 fits nothing else. My rule: pick one connector and stick to it. If a new quad arrives on something weird, chop the plug off and solder on yours. For me that's BT2.0, with a sprinkle of A30, because they connect to each other. 65–85mm 1S whoops only.
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The table
| Connector | Used by | Mates with | WhoopStor V3 |
|---|---|---|---|
| BT2.0 | BETAFPV Air65/Air75/Meteor, LAVA II packs | A30 | Native BT2.0 port |
| A30 (GNB) | Mobula6 2024, Curve Micro 16 HD | BT2.0 | BT2.0 port (some fit loosely) |
| PH2.0 | Older whoops, older Tinyhawk packs | NX69 quads take PH2.0 packs | Native PH2.0 port (recessed) |
| NX69 | Hummingbird V4.1, Hummingbird RS V2 | PH2.0 | Via PH2.0 pigtail |
| EM2.0 | Tinyhawk Aero, Nanoscout | Nothing else | Adapter only |
Skip XT30 (1.6 g a pair vs BT2.0's 0.6 g) and GNB27 (heavier, harder to unplug), per Oscar Liang.
BT2.0 and A30: same family, use either
Oscar Liang flew them together for weeks and calls them compatible; in his 12 A test BT2.0 was only marginally ahead. Per KiwiQuads, A30 packs in a BT2.0 quad is officially supported; BT2.0 packs in an A30 quad is not (the A30 has a notch), though it is widely flown.
PH2.0: legacy, retire it on brushless
PH2.0 is the lightest plug (0.4 g) and showed the most sag in Oscar's test, which cost flight time. Don't buy new PH2.0 packs; it lives on as a charger port.
NX69: a PH2.0 cousin, not BT2.0
NewBeeDrone moved the Hummingbird V4 series to NX69 on August 29, 2025; the RS V2 uses it too. It's backward-compatible with PH2.0, not BT2.0. NBD recommends its Nitro Nectar 300mAh 1S HV NX69 packs (none ship with the quad) and claims 26.38 A peak versus 25.17 A on BT2.0. That's a manufacturer claim.
EM2.0: its own island
The Tinyhawk Aero's EM2.0 isn't plug-compatible with BT2.0, A30 or PH2.0 (Unmanned Tech). EMAX rates it at 10 A continuous, 20 A burst and 12.5 mΩ; it recommends its 1S HV 320mAh EM2.0 pack (270–750 mAh in store) and includes none.
One connector, re-pigtail everything else
Standardize on one plug and convert any quad that ships on another. Mine is BT2.0, plus some A30 packs, because the two inter-connect. That's my practice, not a test result. An A30 quad needs nothing; an EM2.0 or NX69 quad gets its pigtail swapped to BT2.0. Unmanned Tech notes the Aero's lead is long enough to re-solder. EMAX warns that converting moves you off the electrical path it tested. Adapters are for charging only: Oscar's test shows a weaker joint means more sag, and an adapter adds a joint and weight.
Charging on a WhoopStor V3
The WhoopStor V3 has PH2.0 and BT2.0 ports and does LiPo or LiHV. Oscar confirms A30 packs fit the BT2.0 ports, though some commenters report a loose fit. NX69 packs charge through the PH2.0 port with NBD's pigtail, which NBD bundles with a WhoopStor 3 in its starter kit. EM2.0 needs an adapter or EMAX's charger.
What I fly
All my packs are BT2.0: the weBLEEDfpv 340 on 65mm, and the LAVA II 480 or weBLEEDfpv 450 on 75mm. New to this? See First Tiny Whoop Setup and the calculator.
Next: pick your pack size in 1S Whoop Battery by Size, and buy it in BT2.0.