1S LiPo Battery Connectors Explained: BT2.0 vs PH2.0 vs A30

BT2.0 vs PH2.0 vs A30 at a Glance

All three connectors appear on small 1S batteries, but they are not three names for the same plug. PH2.0 uses a small rectangular housing with two contacts. BT2.0 and A30 use larger, lower-resistance contact arrangements intended for the higher current demanded by modern brushless whoops.

Do not choose by the largest current number alone. A tiny-whoop power system is a chain that includes the cell, connector, wire, solder joints, flight controller, and motors. A lower-resistance plug can remove one bottleneck, but it cannot repair a weak battery or create capacity that the cell does not have.

Why a Tiny Connector Can Change 1S Performance

A 1S aircraft operates from a small voltage margin. A conventional LiPo reaches 4.20 V when fully charged, while a LiHV pack may reach 4.35 V. When the motors demand current, resistance in the battery, connector, wiring, and electronics causes the voltage seen by the flight controller to fall.

That voltage drop is commonly called sag. Excess connector resistance can make a whoop feel softer under throttle, trigger low-voltage warnings earlier, and shorten the useful portion of a flight even when the battery still contains energy. The effect becomes more noticeable as motor demand rises or the connector wears.

PH2.0 is especially difficult to describe with one performance number because tiny-whoop equipment has used both folded-contact and improved solid-pin versions. A fresh solid-pin PH2.0 lead can perform better than a worn folded-contact lead, but it still does not turn PH2.0 into BT2.0 or A30.

BETAFPV says BT2.0 replaces the smaller crimped contact arrangement with 1.0 mm banana-style contacts and rates its connector for 9 A continuous and 15 A burst. Those are manufacturer figures, not a promise that every whoop will fly a specific number of seconds longer. The practical benefit is more consistent voltage delivery under load.

Are BT2.0 and A30 Compatible?

They are similar enough that some specific battery, aircraft, and charger combinations may mate, but they should not be treated as universally interchangeable. Small differences in housing shape, keying, connector direction, and manufacturing tolerance can determine whether a particular pair fits cleanly.

GNB's official A30 product page lists separate A30-M battery-side and A30-F drone-side parts, plus a purpose-built A30-to-PH2.0 charging adapter. VIFLY's official WhoopStor 3 specification lists PH2.0 and BT2.0, not A30. Neither page provides a blanket guarantee that every A30 and BT2.0 combination works safely in both directions.

That distinction matters because a connector that can be pushed together is not automatically a supported connection. Excess force can deform the plastic housing, weaken contact pressure, or make polarity harder to verify. If a battery seller says its A30 pack is compatible with a specific BT2.0 aircraft or charger, follow that documented pairing. If the listing is silent, use an appropriate adapter or a native A30 charging port instead of forcing the connection.

The Connector Is Only One Part of Battery Compatibility

Matching the plug is necessary, but it is not enough. A battery can have the correct connector and still be the wrong physical size, voltage type, capacity, or weight for the aircraft.

The most commonly missed item is battery shape. Some 1S packs place the connector directly on the battery head, while others use a short flexible lead. Two packs with the same capacity and connector can fit differently in the same frame.

For a broader explanation of cell voltage, storage, and battery selection, use our FPV drone battery guide. The connector tells you how the pack attaches. It does not tell you the correct charging voltage or whether the pack fits the aircraft.

Which 1S Battery Connector Should You Choose?

Choose PH2.0 when preserving an existing fleet

Keeping PH2.0 can be the practical choice if you already own several healthy batteries, a working charger, and a whoop that meets your needs. Replacing every connector and pack costs money, introduces soldering risk, and may produce only a modest benefit on a low-demand aircraft.

Check whether the aircraft has the older folded-contact style or a better solid-pin lead before assuming every PH2.0 system performs the same. If the plug feels loose, becomes warm, or shows damage, replace the pigtail rather than treating intermittent power as normal.

Choose BT2.0 for a straightforward modern setup

BT2.0 is the easiest general recommendation for a new fleet when the whoop you want is available with it. BETAFPV publishes the connector design and rating, replacement leads are readily available, and the VIFLY WhoopStor 3 provides native BT2.0 charging alongside PH2.0.

That makes BT2.0 especially convenient when you are transitioning gradually. The charger can serve older PH2.0 packs and newer BT2.0 packs without requiring a separate charger for each connector type.

Choose A30 when the equipment you want is already A30

A30 makes sense when your preferred whoop and GNB batteries use A30 natively. There is little reason to replace a supported A30 system with BT2.0 solely because the housings look similar or one connector is more familiar.

Plan the charging path before ordering a large battery set. If your charger does not explicitly list A30, budget for the correct adapter or choose a charger with native A30 support. Do not assume a BT2.0 socket guarantees compatibility.

For most buyers, the ecosystem is the tiebreaker between BT2.0 and A30. A native, consistent connector across the whoop, spare batteries, and charger is more valuable than a theoretical advantage that requires adapters at every session.

Should You Use an Adapter or Convert the Connector?

An adapter can solve a charging mismatch, but it is usually a poor way to chase better flight performance. A PH2.0-to-BT2.0 or PH2.0-to-A30 flight adapter keeps the PH2.0 contact in the current path and adds another pair of contacts. The original bottleneck remains, while the adapter adds weight and another failure point.

For charging at modest current, a purpose-built adapter can be reasonable when it has the correct polarity and is in good condition. GNB, for example, lists an A30-to-PH2.0 charging adapter as part of its A30 connector range. Keep adapters labeled so they are not confused with similar-looking leads.

Converting the aircraft is safer than reterminating live batteries

If you have soldering experience, replacing the aircraft's battery pigtail can create a clean permanent conversion. Confirm polarity at the flight controller and new connector before applying power. Secure the lead so crashes cannot pull directly on the solder pads.

Changing connectors on batteries creates more risk because the leads remain energized. Accidentally touching the conductors can short the cell, damage the pack, or start a fire. Do not cut both battery wires at once, do not work with exposed conductors touching a metal surface, and do not attempt battery retermination if you are not already comfortable with LiPo handling and soldering.

Charging PH2.0, BT2.0, and A30 Batteries

The VIFLY WhoopStor 3 officially supports PH2.0 and BT2.0 batteries across six independent channels. VIFLY specifies adjustable charging from 0.3 A to 1.3 A per port, with 4.20 V LiPo, 4.35 V LiHV, 3.80 V storage, and 3.85 V storage targets.

The separate voltage modes are important because the plug does not identify the cell chemistry. BT2.0, PH2.0, and A30 batteries may be sold as conventional LiPo or LiHV. Read the battery label, choose the matching target, and set a charging current permitted by the battery manufacturer.

WhoopStor 3's official specification does not list A30. An A30 battery should therefore be treated as supported only when the battery or adapter supplier documents the exact connection you intend to use. GNB sells a dedicated A30-to-PH2.0 charging adapter, which provides a defined route for a charger with PH2.0 support.

Our 1S LiPo charger comparison explains how connector support, independent channels, storage mode, and input-power requirements affect the choice. For a closer look at this model's operation and limitations, see the VIFLY WhoopStor 3 review.

Final Takeaway

Frequently Asked Questions

Can an A30 battery plug into a BT2.0 connector?

Some specific A30 and BT2.0 combinations may fit, but the two standards should not be treated as universally interchangeable. Use the pairing only when the battery, aircraft, charger, or adapter supplier explicitly confirms it. Do not force a plug that does not seat cleanly.

Will BT2.0 make a tiny whoop faster?

BT2.0 can reduce connector resistance and voltage sag compared with a weak or worn PH2.0 connection. That may improve throttle consistency and usable flight performance, but the result depends on the battery, motors, wiring, aircraft load, and condition of the complete power system.

Can I use a PH2.0 battery on a BT2.0 whoop with an adapter?

A correctly wired adapter can make the electrical connection, but it does not remove the PH2.0 contact from the current path. It is useful as a temporary compatibility solution, not as a way to obtain BT2.0-level flight performance.

Does a BT2.0 or A30 connector mean the battery is LiHV?

No. The connector type does not determine the battery's safe charge voltage. Check whether the pack is labeled for a 4.20 V LiPo charge or a 4.35 V LiHV charge before selecting the charger mode.

Can WhoopStor 3 charge A30 batteries?

VIFLY officially lists PH2.0 and BT2.0 support, not A30. Use A30 only through a pairing or adapter that its supplier explicitly documents. GNB offers an A30-to-PH2.0 charging adapter for this type of situation.