Saturday, August 2, 2025

Evaluation: Auline V45 6S 3000mAh & S70 4500mAh Li-ion Battery Packs (18650 & 21700)

Lithium-ion (Li-ion) batteries are gaining reputation in FPV for his or her spectacular vitality density, providing considerably longer flight occasions in comparison with conventional LiPo packs. On this evaluation, I’ll take a look at a few of Auline’s newest Li-ion choices—the V45 6S 3000mAh and S70 6S 4500mAh—and examine them to their earlier era in addition to different well-known packs, together with Lumenier’s 6S 3000mAh and my private favourite, the Molicel P28A.

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Study extra about Li-ion batteries and the way they examine to LiPo on this detailed information: https://oscarliang.com/li-ion-battery-long-range/#Variations-Between-LiPo-and-Li-ion-Batteries

The place to Purchase

Auline provides two collection of Li-ion packs:

  • V45: Makes use of 18650 cells – extra compact and light-weight, with a most discharge present of 45A
  • S70: Makes use of 21700 cells – bigger and heavier, however with a considerably increased discharge present of 70A
Auline V45 6s 3000mah S70 4500mah Li Ion Battery Size Compare

Left: V45 6S; Proper: S70 6S

On this evaluation, I’ll deal with the 6S variants of each variations, as 6S is at present the preferred configuration in fashionable FPV drones.

Get the Auline V45 6S 3000mAh Li-ion from:

Purchase the Auline S70 6S 4500mAh Li-ion from:

Why Select Li-ion over LiPo?

Li-ion batteries provide the next energy-to-weight ratio than typical LiPo packs, which interprets to longer flight occasions for a similar weight. Nonetheless, they arrive with a trade-off—decrease C-rating, which means they will’t ship as a lot present. That’s why Li-ion packs aren’t appropriate for high-power functions like freestyle or racing.

However for long-range FPV, the place effectivity and endurance matter greater than uncooked energy, Li-ion batteries are an ideal match. A majority of these drones usually draw low present, making Li-ion the perfect selection.

Specs

V45:

  • Cell Kind: 18650 Li-ion
  • Cell Configuration: 6S1P
  • Nominal Voltage: 22.2V (3.6V per cell)
  • Max Voltage (Totally Charged): 25.2V (4.2V per cell)
  • Rated Capability: 3000mAh
  • Max Steady Discharge Present: 45A
  • Really useful Cost Present: 3A (1C)
  • Battery Plug: XT60
  • Dimensions: 73 × 56 × 38mm
  • Weight: 314g (~50g per cell)

Auline V45 6s 3000mah Li Ion Battery Weight

S70:

  • Cell Kind: 21700 Li-ion
  • Cell Configuration: 6S1P
  • Nominal Voltage: 22.2V (3.6V per cell)
  • Max Voltage (Totally Charged): 25.2V (4.2V per cell)
  • Rated Capability: 4500mAh
  • Max Steady Discharge Present: 70A
  • Battery Plug: XT60
  • Dimensions: 78 × 65 × 44mm
  • Weight: 428.7g (~68g per cell)

Auline S70 4500mah Li Ion Battery Weight

Auline S70 6S 4500mAh Pack

Auline S70 4500mah Li Ion Battery

The battery arrived well-packaged in bubble wrap inside a sturdy cardboard field, guaranteeing wonderful safety throughout delivery.

Building stays much like the earlier model: easy and minimal to scale back weight. Every pack options tender foam tape on high and backside, and a dual-layer PVC heatshrink wrap. The change from black to white heatshrink is a welcome change—white tends to remain colder underneath direct daylight, which is useful when flying in scorching climate.

Auline S70 4500mah Li Ion Battery 4000mah Size Compare

Every battery is clearly labeled with detailed specs, together with configuration, capability, max discharge present, nominal voltage, and complete watt-hours. It comes with a normal 6S stability lead and an XT60 discharge connector.

Auline hasn’t disclosed the precise cell mannequin used within the S70, however they declare these are premium 4500mAh 21700 cells with a 70A most present. It is a substantial enchancment over the earlier model, which was rated at 4000mAh and 45A.

To help the upper present score, the discharge leads have been upgraded from 16AWG to thicker 14AWG wires, and the size has been prolonged barely to about 7.5cm. The battery can be heavier—428g versus the earlier 398g. This can be attributable to each the improved cells and the thicker wiring.

It’s necessary to notice that these batteries don’t embody onboard BMS (battery administration methods). Whereas BMS safety is beneficial in different functions, it’s not appropriate for FPV drones, as a sudden energy cutoff mid-flight (which a BMS would set off to guard the cells) may end in a crash.

Right here’s a dimension comparability with a typical 6S 1100mAh LiPo battery for reference—these Li-ion packs are barely bigger however provide over 4 occasions the capability!

Auline S70 4500mah Li Ion Battery 1100mah Lipo Size Compare

Capability

To confirm the true capability, I carried out a managed discharge take a look at from 4.2V to 2.7V per cell at 0.5C. This low discharge charge ensures minimal warmth buildup and delivers a extra correct studying of usable capability.

Measured capability: 4442mAh.

Discharge Efficiency

By way of C-rating, the brand new Auline S70 carried out considerably higher than the earlier model. All through a lot of the discharge curve, it maintained round 0.8V much less voltage sag, which means your drone can pull extra energy throughout flight, it ought to really feel extra responsive, agile and highly effective.

Towards the ultimate third of the discharge cycle, the efficiency hole widened even additional. The S70 lasted longer earlier than reaching 2.9V, indicating not simply higher energy supply but in addition elevated complete flight time.

Auline S70 4500mah Li Ion Battery Discharge Testing Graph Compare Old 4000mah

Auline V45 6S 3000mAh Pack

Auline V45 6s 3000mah Li Ion Battery

The V45 pack options basically the identical building and construct high quality because the 4500mAh S70, however it’s noticeably smaller and lighter attributable to using 18650 cells as an alternative of the bigger 21700 cells. That’s additionally why its most steady discharge present is decrease—rated at 45A.

The V45 weighs about the identical because the Lumenier 6S 3000mAh Li-ion pack we beforehand reviewed, however it seems barely extra compact due to Auline’s extra space-efficient packaging.

Auline V45 6s 3000mah Li Ion Battery Lumenier Size Compare

Right here’s a dimension comparability to a typical 6S 1100mAh LiPo battery for perspective—it’s bulkier, after all, however provides over 2.5 occasions the capability in return.

Auline V45 6s 3000mah Li Ion Battery 1100mah Lipo Size Compare

Capability

For the Auline V45 6S 3000mAh, I carried out the identical managed discharge take a look at as with the S70, from 4.2V to 2.7V per cell at 0.5C. The measured capability got here in at 2991mAh, which is actually spot-on with the rated worth—very spectacular consistency.

Discharge Efficiency

The efficiency hole between the Auline V45 and the older Lumenier pack is substantial—it’s like night time and day. Voltage sag is considerably decreased, and energy supply stays extra secure all through the discharge cycle.

The truth is, the Auline V45 even outperformed the Molicel P28A in my testing—broadly thought of among the best 18650 cells for high-performance FPV use. That’s an impressive consequence and makes the V45 stand out as among the best 18650-based Li-ion packs at present accessible.

Auline V45 6s 3000mah Li Ion Battery Discharge Testing Compare Lumenier Molicel P28a

Closing Ideas

From capability to discharge efficiency, Auline’s newest V45 and S70 Li-ion batteries are top-tier. In comparison with earlier Auline fashions and opponents like Lumenier, they ship substantial enhancements in each C-rating and capability. Should you’re on the lookout for a ready-to-use Li-ion battery to maximise flight time with out sacrificing reliability, these are simply among the many finest you will get as we speak.

That mentioned, they aren’t low cost. You may construct your individual Li-ion battery packs and doubtlessly lower your expenses. Right here’s a DIY tutorial if you wish to strive that route: https://oscarliang.com/li-ion-battery-long-range/

My go-to 18650 cells have been the Molicel P28A and P30B cells. They’re well-known for his or her excessive discharge efficiency and have served me reliably for long-range flying. Yow will discover my full comparability and testing outcomes right here: https://oscarliang.com/best-18650-li-ion-battery/

Nonetheless, constructing your individual pack takes time, and there’s at all times some threat concerned when soldering on to cells. For a lot of pilots—particularly these quick on time or on the lookout for peace of thoughts—shopping for an off-the-shelf pack just like the V45 or S70 is a extra sensible selection.

You will get the Auline V45 6S 3000mAh Li-ion from:

Purchase the Auline S70 6S 4500mAh Li-ion from:

Auline V45 6s 3000mah S70 4500mah Li Ion Battery

Which One to Select?

V45 is right for smaller builds corresponding to cinewhoops, 4-inch long-range, and light-weight 5-inch drones the place energy and payload capability are restricted.

S70, alternatively, provides extra punch and capability—excellent for extra highly effective 5-inch, 6-inch, and 7-inch long-range quads that demand increased present draw and longer endurance.

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