UPP's UL-certified Hailong battery. Note: We recommend HAILONG brand over UPP for safety, but this UL-certified version is significantly safer than non-certified UPP packs.
The Bottom Line: UPP's UL-certified Hailong battery. Note: We recommend HAILONG brand over UPP for safety, but this UL-certified version is significantly safer than non-certified UPP packs. Check current price on Amazon →
Overview
UPP 48V/52V Hailong Ebike Battery (UL Certificated) is a Ebike Battery from UPP, designed for UPP loyalists wanting UL-certified version. It's priced at $199 - $279 and currently has a 4.0-star rating from 200+ verified Amazon buyers.
UPP's UL 2271 certified version of their popular Hailong battery. The UL certification is significant — it means this battery has passed independent safety testing, unlike UPP's non-certified packs which have been the subject of safety litigation. Note: We still recommend HAILONG brand over UPP for safety, but this UL-certified version is significantly safer than non-certified UPP packs.
UPP's UL-certified Hailong battery. Note: We recommend HAILONG brand over UPP for safety, but this UL-certified version is significantly safer than non-certified UPP packs.
Key Specifications
Pros & Cons
Pros
- UL 2271 certified (rare for budget batteries)
- 30A BMS handles 1000W motors
- 48V and 52V options
- Lower price than HAILONG
Cons
- UPP has documented safety litigation history
- Inconsistent cell quality
- Warranty honor complaints
Detailed Review
When evaluating the UPP 48V/52V Hailong Ebike Battery (UL Certificated), we looked at it across six dimensions: spec-to-price ratio, brand reputation and warranty support, real Amazon buyer reviews, use-case fit, safety certifications, and our own hands-on experience where applicable.
The UPP brand has a decent reputation in the e-bike conversion kit space, with 200+ verified Amazon reviews backing the 4.0-star average. The Compatible with 500W-1500W motors power output places it in the Ebike Battery category, which is appropriate for UPP loyalists wanting UL-certified version.
At $199 - $279, this product offers 48V / 52V operation with N/A of torque. The LED state-of-charge gauge provides clear feedback, and the 30A BMS (UL 2271 certified) delivers 30A BMS (UL 2271 certified) feel.
Who Should Buy This?
Riders who specifically want a UPP battery (perhaps due to brand familiarity) but want the safest UPP option. If you don't have a strong preference for UPP, we recommend the HAILONG 48V 15Ah instead.
The UPP 48V/52V Hailong Ebike Battery (UL Certificated) is best suited for:
- UPP loyalists wanting UL-certified version — the primary use case this product was designed for
- Riders who want 30A BMS (UL 2271 certified) technology
- Builders who need Compatible with 500W-1500W motors of power
- Anyone who values UPP's reputation and warranty support
How It Compares
See how the UPP 48V/52V Hailong Ebike Battery (UL Certificated) stacks up against similar products:
- Best E-Bike Conversion Kits 2026 (overall rankings)
- Best Mid-Drive Kits (if applicable)
- Best Hub Motor Kits (if applicable)
- Best E-Bike Batteries (if applicable)
Installation & Usage Notes
UPP 48V/52V Hailong Ebike Battery (UL Certificated) installs via Hailong mounting. For full installation instructions, see our complete install guide. Most installations take 30 minutes to 3 hours depending on product type and your mechanical experience.
Where to Buy
The UPP 48V/52V Hailong Ebike Battery (UL Certificated) is available on Amazon with verified buyer reviews and easy returns. Click below to check current pricing and availability: