- Out of stock
7.4V 3000mAh 2S Li-ion Battery SM-3P
• Specifications (per pack): 70 × 38 × 18mm; 96g; 3000mAh; 7.4V (2S Li-ion); SM-3P plug; soft PVC wrap.
• 2-Pack with USB Charging: 2× battery + 2× USB-A charging cable. Plug into any 5V USB port (phone adapter, laptop, power bank, car USB) — no separate charger needed. Full charge: ~2–3 hrs. Use one, charge the other.
• Designed for RC Trucks, Crawlers, and Construction Vehicles: Compatible with Huina 1575 RC Construction Truck, RC Tank, 4WD RC Rock Crawler, and similar 2S 7.4V toy-grade RC vehicles. Built for children's RC vehicles (ages 6–14) and casual outdoor play. This is NOT a high-performance hobby-grade or racing battery.
⚠️ Before Ordering — Verify 3 Things:
• 1) Your vehicle's original battery is 7.4V (2S), not 6V or 11.1V.
• 2) The battery bay fits 70 × 38 × 18mm (including SM-3P plug clearance).
• 3) The battery plug is SM-3P (three-pin flat). If any don't match, this pack will not fit.
• Li-ion, NOT LiPo: Charges via USB at a fixed 7.4V profile. Do NOT use a LiPo balance charger on this pack.
• Package: 2× PCEONAMP 7.4V 3000mAh 2S Li-ion battery (SM-3P plug), 2× USB-A charging cable, 1× user manual.
Frequently Asked Questions
Is this battery compatible with my RC truck or crawler?
Yes, if your vehicle uses a 7.4V (2S) battery with an SM-3P plug and the bay fits 70 × 38 × 18mm. Specifically fits Huina 1575 RC Construction Truck, RC Tank, 4WD RC Rock Crawler, and similar 2S 7.4V toy-grade RC vehicles.
What does SM-3P mean? Is it the same as SM-2P or SM-4P?
SM-3P is a three-pin flat connector. It is NOT interchangeable with SM-2P (two-pin) or SM-4P (four-pin) — the pin count and spacing differ. Check your vehicle’s original plug or manual to confirm it is SM-3P before ordering.
Can I charge this with a LiPo balance charger?
No. This is a Li-ion battery, not LiPo. It charges exclusively via the included USB-A cable into any 5V USB port (phone adapter, laptop, power bank, car USB). A LiPo balance charger will not work and may damage the pack.
How long does it take to fully charge?
Approximately 2–3 hours with a 5V/1A USB source (typical phone adapter). Slightly faster with a 5V/2A adapter. No separate battery charger is needed.
Will this work in a high-performance or racing RC vehicle?
Not recommended. This is a 15C (45A) pack designed for toy-grade and entry-level RC trucks, crawlers, and construction vehicles. High-performance or racing vehicles typically draw 50–100A+ sustained and require dedicated LiPo packs.
Is this suitable for children’s RC vehicles?
Yes. This battery is built for children’s RC vehicles (ages 6–14) and casual outdoor play. The Li-ion chemistry is inherently more stable than LiPo under normal use. Children should not open, cut, or modify the pack. If swelling, excessive heat, or damage is observed, discontinue use immediately.
How many charge cycles can I expect before capacity fades?
Under normal toy-grade use (light to moderate throttle), expect 200–300 cycles before noticeable capacity drop. Store at 40–60% charge when not in use for best long-term health.
What comes in the box?
2× PCEONAMP 7.4V 3000mAh 2S Li-ion batteries (SM-3P plug), 2× USB-A charging cables, 1× user manual.