How long does a 4000mAh 3S pack last?
A 4000mAh 3S LiPo lasts about 8 minutes at a 25 A average draw (1/10 2wd brushless, mixed driving), using 80 percent of capacity. It holds 44.4 Wh at 11.1 V, and charges from a normal run in about 108 minutes at 2 A.
RIAARIO 3s Lipo Battery 30C 5000mAh 11.1V Lipo Battery
- 3S
- 5000mAh
The closest current 3S listing to 4000mAh in our catalog. Check the plug and the battery tray size before ordering.
$59.99 listed price, changes often
Check price on AmazonHow long does 4000mAh 3S last by car type?
| Car and driving | Average draw | Runtime |
|---|---|---|
| 1/10 crawler, trail pace | 6 A | 32 min |
| 1/10 2WD brushless, mixed driving | 25 A | 8 min |
| 1/10 4x4 brushless bashing | 35 A | 5 min |
| Wide open speed runs | 60 A | 3 min |
The draws are typical averages over a run, not peaks. Launches and wheelies pull several times more for a moment. Runtime = 4 Ah x 0.8 usable / average amps x 60. Try your own figures in the LiPo runtime calculator.
How much current can a 4000mAh pack deliver?
| C rating | Max continuous |
|---|---|
| 50C | 200 A |
| 100C | 400 A |
How long does a 4000mAh 3S pack take to charge?
| Charger current | From 80% used |
|---|---|
| 1 A | 215 min |
| 2 A | 108 min |
| 5 A | 43 min |
1C for this pack is 4.0 A. Charge at or below 1C unless the pack label allows more. Details in the charge time calculator.
Other pack sizes on 3S
- 2200mAh 3S: about 4 min
- 3000mAh 3S: about 6 min
- 5000mAh 3S: about 10 min
- 5200mAh 3S: about 10 min
- 6000mAh 3S: about 12 min
- 7600mAh 3S: about 15 min
Packs, a charger and a LiPo bag
Get this list emailed to you
Every pick on this page with its current price in one email, so you can decide later. One email, no sequence.
Frequently asked questions
How long does a 4000mAh battery last in an RC car?
At 3S it depends almost entirely on average current draw. 1/10 crawler, trail pace: about 32 minutes; 1/10 2WD brushless, mixed driving: about 8 minutes; 1/10 4x4 brushless bashing: about 5 minutes; Wide open speed runs: about 3 minutes. These use 80 percent of the rated capacity, which is the safe depth of discharge for LiPo packs. Bigger tires, taller gearing and grass all raise the draw and shorten runtime.
What C rating do I need for a 4000mAh 3S pack?
Maximum continuous current is capacity in amp hours times C. At 4000mAh a 50C pack is rated for about 200 A and a 100C pack for 400 A. Real draw in most cars is far lower, so a quality 50C pack is plenty for 1/10 bashing; the higher rating mostly means less voltage sag and a cooler pack.
RCCarCalc is researched guidance, not professional advice. Figures come from published manufacturer specifications, listings and verified owner reports, not hands-on testing. Speeds are theoretical or as listed; real results depend on gearing, battery, tires and terrain. See how we research.