⚡ Ride Longer, Charge Smarter, Lock Safer — Power Your Freedom!
This 48V 20Ah lithium-ion ebike battery supports motors from 500W up to 1500W with a robust 40A discharge current. Featuring a secure lock mount, LED charge indicator, and proven durability with over 800 charge cycles retaining 80% capacity, it’s engineered for reliable, long-lasting performance. Backed by a 1-year warranty and lifetime technical support, it’s the smart upgrade for serious e-bike riders seeking power, security, and peace of mind.
| ASIN | B09MCW6WPJ |
| Amperage | 40 Amps |
| Antenna Location | Bicycle |
| Battery Capacity | 20 Amp Hours |
| Battery Cell Type | Lithium Ion |
| Battery Weight | 4.19 Kilograms |
| Best Sellers Rank | #67,095 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #163 in Adult Electric Bicycles |
| Brand | Unit Pack Power |
| Built-In Media | Lock |
| Customer Reviews | 4.3 4.3 out of 5 stars (42) |
| Manufacturer | Unit Pack Power |
| Model Name | S039-3 |
| Model Number | S039-3 |
| Number of Batteries | 1 Lithium Ion batteries required. |
| Reusability | Rechargeable |
| UPC | 770456864005 |
| Unit Count | 1.0 Count |
| Voltage | 48 |
E**T
These worked well with my refurbished ebikes
I used this replacement battery on my storm damaged ebike and so far (bought two for two bike repairs) it works great. It was more powerful than the original and seems to hold a charge for many days of riding around our winter vacation island. Only time will tell if this replacement e-bike battery will last a number of years. I do hope so, as these are not that cheap and so the cost can be justified IF I can get at least 3 years. These were also much cheaper than the factory originals.
D**.
Third Time's the Charm
After receiving 2 batteries that you couldn't remove the key while in use (riding) even though the seller said they had them, they finally sent the upgraded model. With work, it just fit with 1/4" to spare on a 2016 Rad Rover. They said it would fit, and it did. This will require modification of the mounting bracket to fit the Rad's bracket receivers. As well, you'll be crimping or soldering the electrical connection.
S**Y
Perfect for my eBike !
Used this product for an eBike I built last year. Works VERY well. LONG battery life. Utilize a durable form fitting bag that Velcro's to the bike frame instead of mounting directly to the frame unprotected. Have never drained the unit in a single bike ride. So far, 20+ miles & still have power. Only downside is the weight.
L**M
Se le hizo una adaptación para una bicicleta y quedó perfecta la verdad superó mis expectativas
R**T
20 amp hour battery
I like the first battery that I bought so well that I bought a second and built my other bike. This battery is definitely worth the money. I run this battery with a 1200 watt motor 48 volt I go 32 miles with one charge I had 1,300 miles on my first battery and wheel when I built the second bike with the same products outstanding products both of my bikes run down the road and you can't even hear them both with 30 miles of battery power on throttle only definitely by this battery guys
J**F
Battery life
Doesnt feel like I got a 20ah battery.. more like a 14ah with a 20ah sticker on it. Gunna take it to get checked.. does not have easy access to fuses and can short out without an easy fix..
G**S
48v 20 Ah E-bike battery.
The charger gets very hot.
T**.
It works and the bike is faster
Appears to be a good battery and I'm happy with the speed increase. I find not having a key ignition on the battery is a negative. It only has a on/off switch which isn't effective anti-theft. This could be an improvement for future iterations. It is a 200$ cheaper battery when compared to the bike manufacturer and is spec wise a better battery. Hopefully it lasts
Trustpilot
1 week ago
1 day ago