What replacement battery fits the Hailong No.2 / Max?

The Hailong No.2 / Max uses a 48V Reention Dorado-style pack. Match voltage, case length and discharge connector to your original — and check whether your bike uses a smart BMS, which requires an OEM-compatible pack.

What voltage is the Hailong No.2 / Max battery?

48 volts, verified across manufacturer specs and multiple replacement listings.

Hailong No.2 / Max Replacement Battery — Which One Fits?

Find your version

last verified Jun 2026

HL-2

Hailong No.2 / Max

USB + on/off switch case

case-ID guide

Voltage

36 / 48 / 52 V

Case

Hailong No.2 / Max

Cells

up to 65× 18650

Discharge

4 or 5-pin

Charge

3-pin XLR

Extras

5V USB + power switch

⚠Always measure your pack before buying. These cases come in more than one length, and a wrong length will not seat. Measure your original end-to-end and match the discharge connector before you buy.

Schematic of a Hailong case e-bike battery case showing where to measure length, the connector, the voltage and model label, and the charge port. — Where to measure and check on a Hailong case pack.

Also fits

Cross-compatible models SAME PACK

Hailong No.1different mount — not interchangeable

Hailong G56 / G70 / G80G80 is the 21700 successor

Do not use these

⚠ Wrong-fit hazards

Confusing it with No.1. No.2 has a different mount and tray than No.1. They do not interchange.
4-pin vs 5-pin plug. Confirm your discharge connector — both exist on this case size.
Wrong voltage. Match 36/48/52V to your bike.

Where to buy

Affiliate disclosure: some links below are affiliate links. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. We are not paid to recommend any specific battery.

Replacement packs

For: Hailong No.2 / Max — match connector & voltage

Amazon

multiple sellers · check current price & reviews

Check price →

eBay

new & refurbished

Check price →

How this was verified

Sourcing. Specs for the Hailong No.2 / Max were cross-checked across manufacturer specifications, multiple independent replacement-battery listings, and first-hand owner reports on e-bike forums. Items marked "measure," "verify," or "check" depend on your specific unit and are not safe to assume.

verified — multi-sourceconfirm on your pack

⚠Lithium batteries can be dangerous if mismatched. This is sourced reference data with confidence levels, not a fitment guarantee. Confirm voltage, length, connector and BMS type against your own pack, and buy from a reputable seller. Read the safety guide →

Own one of these?

Help keep this page accurate. If you've replaced the battery on your Hailong No.2 / Max, tell us what actually fit — your exact length, connector, or model year. We review every owner report and merge confirmed ones.

Owner reports are reviewed before any page is updated. Thanks for helping keep this accurate.

Which replacement battery fits a Hailong No.2 / Max?