iFlight Defender 25 550mAh 4S
| Chemistry | LiPo |
|---|---|
| Cells | 4S |
| Capacity | 550 mAh |
| C-rating | 60C |
| Energy | 8.1 Wh |
| Weight | 70.0 g |
| Dimensions | 105x35x31.5mm |
| Connector | XT30 |
| Price (approx.) | 26.99 USD |
| Price per Wh | 3.32 USD/Wh |
12.7 g per 100 mAh - denser than average - more grams per mAh among the 65 4S LiPo packs in our database (11.4). Price per Wh ($3.32) vs the $1.88 average of the 65 4S LiPo packs that publish one.
How much current can it deliver?
Rated 60C on 550 mAh, the iFlight Defender 25 550mAh 4S is labelled for ≈ 33 A continuous (0.55 Ah × 60). Marketing C-ratings are optimistic, so keep real draw well under that.
Flight time with this battery
With 80% of its 550 mAh used, the iFlight Defender 25 550mAh 4S gives 0.44 Ah, 26.4 amp-minutes: divide by the average draw in A for the minutes. On the quad it fits, at our cruise-current estimate: Defender 25 ≈ 5.3 min (5 A).
Fits these quads
- iFlight Defender 25 — recommends 4S 550mAh
Where this data comes from
The size is the housing's, not a pouch's: 105x35x31.5 mm around a 550mAh 4S is 0.60 g/cm3, a third of what a pack of cells weighs for its volume, because this pack is a moulded, vented shell with a latch and slide rails that only the Defender 25 accepts. iFlight's own page states the same 105*35*31.5mm (and the same three figures for the 900mAh version at 100 g - a size that does not move with the capacity is the enclosure's), 70+/-2 g, 8.14 Wh, 4S1P, 60C and XT30, so every figure here is the manufacturer's as well as the retailer's