Gens ace 14.8 V (4S) LiPo Batteries

Gens ace 4S LiPo packs are built for applications that need crisp punch with consistent voltage through the run. They pair low internal resistance with solid construction for reliable performance in 1/8-scale cars, mid-to-large RC boats, and 4S multirotors.

Who Should Choose 4S

• Use 4S if you run 1/8 buggy/truggy classes, need longer full-throttle stamina in boats, or prefer the efficient, predictable feel of 4S on quads.
• Avoid 4S if your ESC/motor are not 4S-rated, or your class mandates 2S/3S. Consider 6S only if the system is designed for it and you need higher top speed with lower current per watt.

How to Choose the Right Pack

1. Capacity (mAh): Pick the smallest capacity that comfortably completes your target run with a margin.
   • 1/8 buggy/truggy: 5000–6500 mAh (hardcase).
   • RC boats: 4000–8000 mAh (case style depends on mounting and protection).
   • 5-inch quads: 1300–1800 mAh (softcase).
2. Discharge (C rating): Choose a rating that covers peak current with headroom. Example: a 5000 mAh 50C pack claims up to 250 A; realistic continuous draw is often lower, so keep connectors and wiring sized appropriately.
3. Case style: Hardcase for ground vehicles exposed to impacts; softcase for aircraft to save weight (pad and secure against vibration).
4. Connectors and wire: Use high-current connectors sized for 4S: XT90/EC5 (common), QS8/AS150 for very high bursts. 10–12 AWG leads are typical for high-draw 4S systems. Avoid adapter chains.
5. Size and weight: Verify tray space and CG. Typical 4S 5000–6500 mAh hardcase packs are roughly 135–140 × 46–48 × 45–50 mm and 450–600 g; confirm model-specific specs before purchase.

Quick Recommendations

Use case	Typical pack	Connector	Notes
1/8 buggy/truggy racing	4S 5000–6500 mAh, 50C+	XT90 or EC5	Hardcase; prioritize low IR and consistent voltage.
RC boats (mid/large)	4S 5000–8000 mAh, 60C+	EC5/IC5 or QS8	Secure against water ingress; monitor ESC temps on long WOT pulls.
5-inch FPV quad	4S 1300–1800 mAh, 75C+	XT60	Softcase; balance weight vs. flight time for your style.

Expected Performance

• 1/8 buggy/truggy: 5000–6500 mAh typically yields ~10–18 minutes depending on layout, gearing, and throttle use. Set gearing for motor temps under ~185–200°F (85–93°C).
• RC boats: 5000–8000 mAh often gives ~6–12 minutes at high load; prop choice and hull drag dominate. Watch ESC temp and ripple voltage.
• 5-inch quads: 1300–1800 mAh usually provides ~3–6 minutes; freestyle vs. cruising makes a large difference.

Compatibility Notes

• ESC/motor rating: Confirm both are 4S-capable.
• Motor KV guidance (typical): 1/8 buggy 1900–2200 KV; boats 1200–2200 KV depending on prop; 5-inch quads 2300–2700 KV on 4S. Adjust gearing/prop to keep temps in range.
• LVC (low-voltage cutoff): Start around 3.2–3.4 V per cell under load (12.8–13.6 V pack). Avoid running below ~3.5 V per cell at rest.

Setup, Cooling, and Longevity

• Start conservative: Drop 1–2 pinion teeth (or prop down) when moving to 4S; build back based on temperature data.
• ESC timing/punch: High timing plus high voltage increases heat; reduce and re-test.
• Cooling: Keep airflow across motor and ESC; consider fans and heat sinks for cars and boats.
• Charging: Balance-charge on a non-flammable surface and remain present. 1C is a safe default (e.g., 5000 mAh → 5 A). From storage (~3.8 V/cell) to full typically takes ~45–75 minutes at 1C.
• Storage: Store at 3.75–3.85 V per cell in a fire-resistant bag/box. Do not store fully charged or fully depleted.
• Cool-down: Let packs return to ambient temperature before recharging (often 10–20 minutes).
• Retire on damage: Stop using packs with swelling, punctures, or compromised leads.

Troubleshooting

• Voltage sag under throttle: Check connectors for wear, shorten leads, use higher C-rated pack, or reduce gearing/prop load.
• Short runtimes: Verify actual mAh charged, inspect for drivetrain drag or hull fouling, and moderate full-throttle use.
• Thermal throttling: Add cooling, lower timing/punch, and gear or prop down.

FAQ

Do I need a hardcase or softcase?

Use hardcase for cars/truggies to protect against impacts and chassis flex. Use softcase for aircraft to save weight; pad and secure the pack.

What connector should I run?

XT90 or EC5/IC5 are common for high-current 4S systems; QS8/AS150 for very high bursts. XT60 suits many 4S quads. Avoid long adapter chains.

How low can I discharge a 4S LiPo?

Under load, set LVC around 3.2–3.4 V per cell. At rest, avoid dropping below ~3.5 V per cell to preserve cycle life.

What charge rate is safe?

1C is a conservative default unless the specific Gens ace pack lists a higher allowable rate. Always balance-charge and monitor.

Will 4S damage my electronics?

No, provided your ESC and motor are 4S-rated and you tune gearing, timing, and cooling appropriately. Always verify component specs first.