Gens ace Batteries 7.4 V (2S)

Gens ace 7.4 V (2S) LiPo Batteries

Gens ace 2S packs provide dependable 7.4 V power for common 1/10-scale RC cars and trucks, small boats, crawlers, and beginner aircraft. They balance punch, runtime, and manageable temperatures, with options for capacity, C rating, case style, and connectors to fit most setups.

When 2S Is the Right Choice

• Use if your ESC and motor are rated for 2S and you want controllable speed and cooler temps.
• Great for 1/10 touring, buggy, short course, drift, crawlers, and small hull boats.
• Choose for trainer planes and light foam aircraft that prefer lower weight and smooth throttle.

Avoid 2S if you need maximum top speed (consider 3S with compatible electronics) or you are powering heavy high-draw boats that typically benefit from higher voltage.

How to Choose a Gens ace 2S Pack

• Capacity (mAh): Higher mAh = longer runtime but more weight. Typical: 4000–6000 mAh for 1/10 cars/trucks; 3000–5000 mAh for trainer planes.
• C Rating: Match to current draw. 30–50C suits casual bashing, crawling, and sport use; 60–100C for racing or high-draw motors/boats.
• Case Type: Hardcase for off-road and track cars (impact protection). Softcase for planes/drones where low weight and fitment matter.
• Connector: Common options include Deans/T-Plug, XT60, EC3/EC5. Match your ESC plug or plan to solder an adapter; confirm polarity.
• Dimensions and Weight: Check your battery tray length, width, and height. Many 1/10 cars fit “stick pack” hardcases; aircraft often need slimmer softpacks.

Quick Recommendations

Use Case	Capacity	C Rating	Case
1/10 basher / short course	5000–6000 mAh	50–80C	Hardcase
1/10 crawler / trail	2200–4000 mAh	30–50C	Soft or hard
1/10 touring / drift	4000–5200 mAh	50–100C	Hardcase
Small boats	4000–6000 mAh	60–100C	Hardcase
Trainer planes	2200–4000 mAh	30–50C	Softcase

Estimated Runtime

Approximate runtime (minutes) ≈ (Capacity mAh ÷ (Avg amps × 1000)) × 60 × 0.8.

• Example: 5000 mAh pack with a 15 A average draw ≈ (5000/15000) × 60 × 0.8 ≈ 16 minutes.
• Crawlers often average 3–8 A: a 3000 mAh pack can last 18–45 minutes. Boats may average 30–60 A: a 5000 mAh pack can last 4–8 minutes.

Compatibility and Setup

• Confirm your ESC input voltage (2S compatible) and set Low Voltage Cutoff to ~3.3–3.5 V per cell (6.6–7.0 V total) to protect the pack.
• Balance lead is typically JST‑XH; ensure your charger supports it.
• High-torque servos or powerful motors can cause current spikes; choose a higher C rating if you notice voltage sag or ESC cutouts.

Charging and Care

• Charge with a LiPo-compatible balance charger only. Typical rate: 1C (e.g., 5000 mAh → 5 A). Only use higher rates if the pack label specifies.
• Stop use if any cell drops below ~3.2 V under load or if the pack swells, overheats, or is damaged.
• Storage at 3.75–3.85 V per cell (7.5–7.7 V total). Store cool, dry, and partially charged—never fully charged for long periods.
• Charge on a nonflammable surface, in a LiPo bag or fire-safe container. Never leave charging unattended.

Pros and Cons

• Pros: Widely compatible, balanced performance, manageable temps, broad size and connector options.
• Cons: Lower top speed than 3S setups; hardcases add weight; requires LiPo-specific charging and handling.

Alternatives

• 3S (11.1 V): Higher speed and power if your ESC/motor can handle it; shorter runtime or higher current draw.
• NiMH: Simpler charging and handling, but heavier with lower power density and more voltage sag.

Fitment Checklist

• Tray dimensions and strap height match the pack.
• Connector type and polarity match the ESC (or use a quality adapter).
• ESC LVC configured for LiPo; radio failsafe set.

FAQ

Can I use a 2S pack in any 1/10 RC car?

Most 1/10 cars are designed around 2S, but always confirm ESC and motor ratings, tray size, and connector compatibility.

What C rating should I pick?

For casual driving and crawling, 30–50C is usually enough. Choose 60–100C for racing, heavy vehicles, or boats that draw high current.

Hardcase vs. softcase—what’s better?

Hardcase protects against impacts and chassis rubbing—ideal for cars and trucks. Softcase saves weight and fits tight aircraft bays.

How should I store my LiPos?

Store at 3.75–3.85 V per cell in a cool, dry place. Check voltage monthly and top up to storage level if needed.

Can I charge at 2C?

Only if the pack label specifies a higher charge rate. Otherwise, stick to 1C to maximize longevity.