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HaiLong 36V 13Ah E-Bike Battery Review — Worth it for Commuters?

Introduction — the problem and the solution
If you ride an electric bike regularly you’ve likely faced the same set of problems: limited range, bulky aftermarket batteries that don’t fit your frame, long charge times, or a replacement battery that’s priced like an OEM unit. The HaiLong 36V 13Ah down-tube battery aims to solve those pain points by offering a relatively compact, Hailong-style down-tube pack built with 18650 cells, a standard 5-pin round plug for compatibility, and a price point that undercuts many OEM options.
Specifications & Materials
| Model | HaiLong 36V 13Ah Down Tube (Pedelec) |
| Voltage / Capacity | 36V / 13Ah (481Wh) |
| Cell type | High-power 18650 lithium-ion cells |
| Discharge / Max Current | Standard: 10A, Max: 20A, Protect: 50A |
| Charge | Charge voltage 42V, Charge current 2A (~6.5–7 hours full) |
| Cycle life | Rated 1,000+ cycles |
| Connector | 5 gold-plated round plug (common Hailong style) |
| Weight | Approx. 3.7 kg (with holder) |
| Compatibility | Listed fit: Mifa, Vaun, Prophete, Avocet, Viking, Lectro, Byocycles, Tianneng and other Hailong-style frames |
| Price | $189 USD |
Material & Build Quality
The shell is the familiar black Hailong down-tube casing — durable ABS-style plastic with an integrated holder. The cells are 18650 high-power types (manufacturer doesn’t list Samsung/LG specifically), and the battery includes a built-in BMS (as indicated by the protection/current specs). The 5 gold-plated round plug is a nice touch for reliable contact and reduced corrosion risk compared to cheap plated pins.
Overall the fit-and-finish is solid for an aftermarket pack at this price. The lock/key mount and included charger shown in product photos are useful for daily use. Expect the housing to resist light knocks and weather splashes, but it’s not a sealed HVAC-grade enclosure — keep it covered in heavy rain.
Real-world experience — Pros & Cons
Pros
- Good value for capacity: 13Ah at 36V (around 480Wh) is a respectable pack for commuter range at a low price point.
- Hailong-style mounting: Fits many frames designed for down-tube batteries and installs/replaces easily.
- Connector quality: The 5 gold-plated round plug provides secure electrical contact and simplifies swapping batteries.
- Reasonable weight: At ~3.7 kg with holder it’s manageable for everyday use and removal.
- Included charger and key: Ready-to-use out of the box; charger current of 2A is gentle on cells and supports longevity.
- Cycle life claim: Rated 1,000+ cycles — if true, that’s strong long-term value.
Cons
- Max continuous current is limited: 20A max means it’s ideal for 250W–500W motors; sustained full-power use with 700W motors will push the battery near its limits and may cause voltage sag.
- Slow charging: 2A charging takes roughly 6.5–7 hours to reach full capacity — fine for overnight charging but not for quick turnarounds.
- Cell brand not specified: The pack uses “high power” 18650s but the exact manufacturer (Samsung/LG/Panasonic) isn’t listed, so long-term reliability depends on components used in each batch.
- Weather protection: The casing is sturdy but not a fully sealed IP-rated enclosure; avoid submersion and heavy downpours without additional protection.
- Compatibility caveat: Make sure your bike uses the same 5-pin round plug and Hailong mount; adapters may be required for nonstandard systems.
Performance in practice
In mixed-use city rides (moderate pedal assist, stops, and starts), the 481Wh capacity should deliver roughly 20–40 miles per charge depending on rider weight, assist level, and terrain. For conservative riders using eco assist and pedaling a fair bit, expect the higher end of that range. If you run high assist levels or have a heavier cargo load, plan for shorter range.
The battery starts well in cool mornings and delivers stable voltage under typical loads for 250W–500W motors. If you run a 700W motor at full throttle for extended periods you’ll notice more voltage sag and the pack running closer to its rated max; occasional bursts are fine, but continuous high-current draw will shorten effective range and stress the BMS.
Quick comparison with competitors
HaiLong 36V 13Ah vs OEM branded 36V packs
- Price: HaiLong (~$189) is significantly cheaper than many OEM batteries from major e-bike manufacturers.
- Fit/Finish: OEM packs may offer tighter integration and weather sealing; HaiLong matches form factor but isn’t fully OEM-sealed.
- Warranty & Support: OEM typically has stronger dealer warranty/service; third-party sellers vary.
HaiLong 36V 13Ah vs other aftermarket 36V 13Ah Hailong-style packs
- Price and features are similar across aftermarket packs — the HaiLong stands out for its stated 1,000+ cycle life and gold-plated connector.
- If you can find a pack that explicitly lists Samsung or LG cell chemistry, that may offer more confidence in long-term retention, but those packs often cost more.
Who this battery is best for
- Commuters who need a budget-friendly replacement or spare battery for daily rides.
- Riders with 250W–500W motors who want decent range without paying OEM prices.
- DIY e-bike owners and independent bike shops that prefer Hailong-style down-tube packs for easy install/removal.
- Anyone who needs an affordable, reasonably durable pack and is comfortable verifying connector compatibility before purchase.
Final verdict — Worth it?
If you want a practical, budget-conscious replacement or spare battery that provides solid range for commuter and recreational use, the HaiLong 36V 13Ah is worth considering. For riders with modest power requirements (250W–500W) and those who prioritize cost and easy installation, this pack hits a good balance of capacity, weight, and value. If you run a high-power e-bike (regular 700W+ sustained draws) or require factory-level sealing and warranty support, an OEM or higher-current pack is a safer choice.
Bottom line: A strong value aftermarket battery for most commuter and mid-power e-bikes — just confirm connector and current needs before buying.
Purchase note
The listed price is $189 USD. If you decide to buy, check my store for occasional discount codes and special offers that can shave the price down further.
About store
Yose Power
Professional manufacturer of e-bike battery and conversion kit with a practical selection of replacement batteries and conversion components for online purchase.
Brand overview
Yose Power supplies electric bike batteries and conversion kits for owners looking for spare and replacement parts. The product range available online includes batteries for different voltage systems and conversion kit components. Customer feedback indicates straightforward transactions and compatibility with several common e-bike setups.
Products and real world use
The catalog includes batteries such as 52 volt models and a 36V 13Ah down tube battery with a 5 pins plug described as fit for Heybik Race Race Plus Jasion EB5. Conversion kit components include displays and controls that expand settings and ride information. Typical uses are replacing an existing battery or installing a conversion kit to adapt a conventional bicycle to electric assist.
Key features
Online availability of batteries and conversion kits for direct purchase. Replacement battery options listed for multiple voltage systems including 52V and 36V 13Ah down tube units. KD21C display is offered as an upgraded display option with additional settings and ride information and reports of seamless connection. Customer reviews note that used batteries are sold as advertised and that some used units can appear in like new condition.
Technology and design
Product design focuses on practical compatibility and straightforward installation. Conversion kits are paired with displays that provide additional configuration and readouts. Battery designs in the range include down tube formats and plug types that match specific e-bike models mentioned in product descriptions and customer feedback.
Why Choose Yose Power?
- Clear availability of spare and replacement batteries suitable for common e-bike setups
- Conversion kit components that include displays with expanded settings
- Product descriptions and customer reviews that report straightforward fit and installation
- Options for used and new condition batteries sold as described
Next steps
Browse the Yose Power product listings to compare battery voltages, plug types, and conversion kit components. For specific compatibility questions refer to product details and model notes before purchase to ensure the selected battery or conversion kit matches your e-bike setup.
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