Quick Fit Check
The CNHL Ultra-Thin Racing Series LiHV 6000mAh 15.2V 4S 120C Hard Case LiPo Battery with EC5 Plug is a high-output ultra-thin 4S hardcase LiPo battery designed for users who need strong power, LiHV voltage, hardcase protection, and better tray fitment than many thicker 4S packs. Its biggest advantage is the low-profile 37mm height, which makes this 6000mAh 4S LiHV pack easier to fit in height-sensitive RC boats, trucks, truggies, and hardcase-ready platforms.
Before ordering, confirm that your model supports 15.2V 4S LiHV power, has enough space for a 138 × 47 × 37mm battery, uses an EC5 connector or a properly rated adapter, and can safely handle an approximately 479g pack. If those points match, this battery is a strong choice for drivers who want a slim 4S hardcase battery without giving up capacity, discharge performance, or durability.
Product Specifications
| Capacity |
6000mAh |
| Voltage (S/cell) |
15.2V / 4S LiHV |
| Discharge Rate (Continuous/Burst) |
120C / 240C |
| Output Connector |
EC5 Plug |
| Dimensions (L × W × H) |
138 × 47 × 37mm |
| Weight |
Approx. 479g |
| Charge Rate |
5C Max |
| Balance Connector |
JST-XH |
| Wire Gauge |
10AWG |
| Stock Number |
HC6001204HV |
Core Description
A 6000mAh 4S LiHV hardcase battery is already a serious power option, but this CNHL Ultra-Thin pack stands out because it keeps that capacity and 120C discharge rating in a slimmer hardcase format. At only 37mm tall, it is much easier to work with than many full-size 4S hardcase batteries that become too thick for tight trays, straps, or body clearance.
That low-profile shape matters in real RC use. Many drivers can fit a 4S battery by length and width, but battery height becomes the final problem. A thicker pack may touch the body, strain the strap, pinch wires, or sit poorly in the tray. This ultra-thin 4S hardcase design helps solve that problem while still offering 6000mAh capacity and strong output.
The LiHV chemistry gives the pack a higher fully charged voltage than a standard 14.8V 4S LiPo when charged correctly in LiHV mode. In practical use, that can create a stronger early-run feel, sharper throttle response, and more energetic power delivery. Combined with the 120C discharge rating, this battery is a strong fit for users who want a slim hardcase pack that still feels serious under load.
Why the 37mm Ultra-Thin Hardcase Height Matters
The most important feature of this battery is not just that it is 4S, LiHV, or 6000mAh. It is the combination of those specs with a 37mm hardcase height. For many RC users, that changes the buying decision completely because battery fitment is often limited by height more than capacity.
A 37mm pack is easier to mount cleanly in many height-sensitive platforms. It can help avoid battery strap stress, wire routing problems, and body clearance issues that may happen with thicker hardcase batteries. That is why this pack should be understood as a thin 4S hardcase LiPo battery, not just another 6000mAh 4S option.
Application Fitment: ProBoat Sonicwake 36 V3
The CNHL Ultra-Thin Racing Series LiHV 6000mAh 15.2V 4S 120C Hard Case LiPo Battery with EC5 Plug is one of the most practical hardcase choices for the ProBoat Sonicwake 36 V3. This boat runs on 8S power in its stock layout by using two matched 4S batteries, and battery thickness is one of the most important details to check before choosing a pack.
Unlike many regular 4S hardcase batteries that may be too thick for the Sonicwake 36 V3 SSL battery tray, this ultra-thin hardcase design gives boat drivers a cleaner way to combine hardcase protection, high discharge output, and tray-friendly sizing. With 6000mAh capacity, 120C output, LiHV voltage, and an EC5 plug, it is especially well suited for high-speed RC boat users who want strong punch and longer runtime potential without moving to an oversized hardcase pack.
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Recommended setup: use two identical 4S packs for the stock 8S ProBoat Sonicwake 36 V3 layout.
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Best for: drivers who want a thin hardcase battery option for the SSL battery tray.
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Connector note: EC5 is a practical high-current connector direction for IC5 / EC5-style setups, but this battery does not provide Spektrum Smart battery data.
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Fitment note: always check tray position, wire clearance, and secure mounting before full-throttle running.
Looking for more battery options for this boat? View our full ProBoat Sonicwake 36 V3 Batteries collection, including ultra-thin 4S hardcase, soft-pack 4S, and advanced 8S LiPo options.
A Practical LiHV 4S Option for Traxxas Jato 4X4 VXL
For drivers looking for more punch and longer runtime from their Traxxas Jato 4X4 VXL, this 6000mAh 4S LiHV pack is worth considering when tray fitment allows. Compared with standard 14.8V 4S packs, LiHV voltage can give a stronger early-run throttle feel during bashing, speed runs, and off-road driving.
What makes this battery especially interesting for the Jato is not only the capacity, but also the low-profile hardcase format. A thinner hardcase can make installation cleaner than a thicker full-size 4S pack, especially on fast off-road platforms where battery mounting and wire clearance need to stay secure.
You can find this and other suitable 4S options in our Traxxas Jato 4X4 VXL battery collection.
A Strong Fit for Traxxas Ford Raptor R 4X4 Ultimate
This 6000mAh 15.2V 4S LiHV hardcase battery is also a strong match for Traxxas short course trucks such as the Ford Raptor R 4X4 Ultimate, where drivers often want a battery that can deliver strong throttle response without creating unnecessary fitment problems.
With its 120C discharge rate, hardcase protection, EC5 plug, and ultra-thin 37mm profile, this pack gives both punch and practical installation benefits. It is a strong option for drivers who want a high-performance 4S battery that feels powerful without becoming overly bulky.
For a full breakdown of setup options, voltage benefits, and connector tips, check our in-depth guide: Ford Raptor R Battery Upgrade Blog.
Applications
This ultra-thin 6000mAh 4S LiHV hardcase battery is best suited for RC boats, 4S RC cars, trucks, truggies, and other hardcase-ready platforms that need strong output but may be sensitive to battery height. It is especially useful when a normal 4S 6000mAh hardcase pack is too thick or difficult to secure cleanly.
- ProBoat Sonicwake 36 V3 using two matched 4S packs
- 4S RC trucks and short course platforms
- RC truggies and high-load surface builds
- Height-sensitive hardcase battery trays
- High-performance 4S LiHV RC setups
- Selected RC boat and marine power systems
- Custom 15.2V LiHV power systems using EC5
More 4S Platform References
This battery is also relevant to users exploring larger 4S surface RC platforms, marine power setups, and hardcase-ready vehicles. These related collections may help with battery planning and connector setup:
Product Photo
What to Check Before Buying
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Voltage: Your model must support 15.2V 4S LiHV power.
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Battery size: Confirm the tray can fit 138 × 47 × 37mm.
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Height clearance: The 37mm profile is thin for a 4S hardcase, but tray straps, covers, and body clearance still need to be checked.
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Connector: This battery uses an EC5 plug. EC5 and IC5 are commonly searched together, but this battery does not provide Spektrum Smart data.
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Weight: Your platform should safely handle an approximately 479g battery.
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Charging: Use LiHV charging mode only with a charger that supports 4.35V per cell.
FAQ
What makes this battery different from a normal 4S 6000mAh hardcase?
Its biggest difference is the ultra-thin hardcase profile. At only 37mm tall, it is thinner than many full-size 4S hardcase batteries, which makes it especially useful for height-sensitive trays.
Why is the 37mm height important?
Battery height is often the real fitment limit on hardcase-ready RC platforms. A thinner pack can fit more cleanly under straps, trays, battery covers, and body shells than a thicker alternative.
Can this battery work in the ProBoat Sonicwake 36 V3?
Yes, it is a strong fitment-focused hardcase option for the ProBoat Sonicwake 36 V3 when used as a matched pair of 4S packs for the stock 8S layout. Always confirm tray position, wire clearance, and secure mounting before running.
What is the benefit of LiHV batteries?
LiHV batteries can charge to a slightly higher maximum cell voltage than standard LiPo batteries when using a proper LiHV charger. This can improve early-run throttle response and punch.
Is EC5 relevant for IC5 users?
EC5 and IC5 are often searched together because they are used in similar larger RC power systems. However, this battery has an EC5 plug and does not include Spektrum Smart battery data, so users should confirm exact connector compatibility before purchase.
Can I charge this battery with a normal LiPo charger?
Only if the charger has a dedicated LiHV mode. Do not charge this pack to 4.35V per cell unless your charger specifically supports LiHV charging.
Notice
- This is a LiHV battery. Use LiHV charging mode only with a charger designed to support LiHV batteries.
- When charging in LiHV mode, stop charging immediately if any cell exceeds 4.35V.
- If charging as a standard LiPo battery, do not exceed standard LiPo voltage limits.
- Check voltage, connector type, tray size, wire clearance, battery strap fit, and body clearance before purchase.
- Inspect the battery surface, connector, wires, case, and cell voltage before first use.
- Do not use the battery if it becomes swollen, damaged, overheated, or physically deformed.
- For high-speed RC boats, always secure both packs firmly and keep wires away from rotating parts and water exposure.
- For long-term storage, store the battery at proper storage voltage in a cool and dry place.
- If a new battery does not initially hold full performance, several normal balanced charge and discharge cycles may help stabilize the cells.
- Always follow standard LiPo and LiHV safety procedures during charging, storage, transport, and use.
