Ovonic Batteries 7.4 V (2S)

Ovonic 7.4 V (2S) LiPo Batteries

Ovonic 2S LiPo packs provide practical, repeatable performance for everyday RC driving and flying. With manageable voltage (7.4 V nominal, 8.4 V fully charged) and moderate weight, they suit most 1/10-scale cars and trucks, rock crawlers, and trainer or park-flyer aircraft without chassis mods.

When to Choose 2S

• Use if you want controllable speed, cooler running temps, and long parts life.
• Use for 1/10 RTR electronics designed around 2S; many ESCs and motors are optimized for it.
• Avoid if your setup requires higher top speed or punch; consider 3S if your ESC and drivetrain are rated for it.
• For very young drivers or simplest maintenance, NiMH is safer but heavier and less powerful.

Compatibility Checklist

• ESC voltage: Confirm LiPo mode and low-voltage cutoff (LVC) support for 2S.
• Connector: Match your ESC plug (e.g., T‑Plug/Deans, XT60, EC3/EC5). Adapters add resistance and heat—use only if necessary and of high quality.
• Dimensions: Most 1/10 hard-case packs use ~138 × 47 × 25 mm "stick" size; verify tray clearance and strap height.
• Weight: Ensure suspension springs and CG remain within your setup window, especially for light buggies and aircraft.

Capacity and C Rating: How to Size Your Pack

Pick capacity for runtime and balance; choose C rating for current headroom. Continuous amps ≈ Capacity (Ah) × C rating. Example: 5000 mAh (5 Ah) at 50C = 250 A theoretical; plan for generous headroom (≥2× your expected draw).

• 1/10 bashers and club racing: 4000–6000 mAh, 50C+ for strong punch and cooler temps.
• Rock crawlers and trail rigs: 2000–3000 mAh, 30–50C for smooth control and light weight.
• Trainer/park-flyer aircraft: 1500–2200 mAh, 20–40C to manage CG and flight time.

Expected Runtime (Typical)

Use case	Typical pack	Average draw	Runtime estimate
1/10 2WD/4WD basher	2S 5000 mAh	10–20 A	15–30 minutes
Rock crawler/trail	2S 2200–3000 mAh	2–4 A	45–120 minutes
Trainer/park flyer	2S 1800–2200 mAh	8–12 A	8–15 minutes

Your driving style, gearing, and wind/terrain can shift these numbers significantly.

Hard-Case vs Soft-Case

• Hard-case: Best for cars/trucks; resists impacts and chassis flex. Slightly heavier and bulkier.
• Soft-case: Lighter and often smaller; ideal for aircraft and lightweight builds. Needs extra protection from abrasion and impacts.

Setup Tips for 2S Performance

• Gearing: Start with stock or slightly conservative gearing to keep motor temps in check.
• ESC punch/brake: Tune to surface grip; reduce punch on low-traction to protect driveline.
• LVC: Set around 3.3–3.5 V per cell under load to protect the pack; stop running if power sags.
• Aircraft CG: Choose capacity that balances your airframe without adding ballast.

Charging and Care

• Charge rate: 1C is a safe default (e.g., 5000 mAh → 5.0 A). Only exceed if the label/spec explicitly allows it.
• Balance charge every cycle on a LiPo-compatible charger; supervise charging in a fire-resistant area/bag.
• Temperature: Keep packs below ~60°C/140°F. Let cool to ambient before recharging.
• Storage: 3.75–3.85 V per cell in a cool, dry place. Check monthly and top up to storage voltage if needed.
• Retire packs that are puffed, punctured, or have damaged leads/insulation.

Alternatives

• 3S LiPo (11.1 V): Higher speed and punch if your ESC/motor/drivetrain are rated for it.
• NiMH: Simpler handling and safer chemistry, but heavier with lower power density.
• LiFe (6.6 V): Safer chemistry with flatter voltage curve; lower voltage than 2S LiPo.

FAQ

Is 2S fast enough for racing?

Yes. Many 1/10 classes mandate 2S. Lap times depend more on gearing, tire choice, and driving consistency than extra voltage.

What connector should I pick?

Match your ESC. Common options include T‑Plug/Deans, XT60, and EC3/EC5. Avoid stacking adapters; each adds resistance and heat.

How do I know if my ESC supports LiPo?

Look for a LiPo mode or adjustable LVC in the manual. If your ESC lacks LVC, use an external low-voltage alarm and monitor pack voltage closely.

How many cycles will I get?

With conservative discharge, proper storage, and balanced charging, several hundred cycles are achievable. High heat, deep discharges, and overcharging shorten lifespan.

Hard-case or soft-case for crawlers?

Either works. Soft-case saves weight and fits tight trays; hard-case adds impact protection if you roll often on rocks.

Bottom Line

For most 1/10 vehicles and entry-level aircraft, Ovonic 7.4 V (2S) packs hit the sweet spot of cost, compatibility, and control. Size the capacity and C rating to your use case, keep temps in check, and follow LiPo care basics for reliable, long-running sessions.