You get a high-capacity battery for a low price that makes established brands look overpriced, at least next to everything else in our 48V battery comparison table. This LOCKBUS 48V 20Ah battery provides 960Wh of energy in a package that prioritizes utility over brand recognition. It is a functional replacement part for folding ebikes that need more range without the premium price tag, and the battery table sorts every option by price per watt-hour if you want to verify that claim yourself.
Specs and Value
The core of this unit is the 960Wh capacity rating. In the world of 48V systems, having 20Ah provides a significant amount of energy for a portable folding bike. The cells are manufactured by Dongguan Yizhan Electronics Technology, which is a known producer of lithium-ion components. Because the cost per watt-hour is much lower than other 48V 20Ah packs from better-known brands, the value proposition is front and center for those seeking to extend the range of their current setup. This means you are getting more raw storage for your money than you would with a household name.
There is some confusion in the listing copy regarding the Battery Management System, or BMS. Some of the text mentions a 30A BMS, but the technical spec table explicitly lists 20A. You should treat the 20A figure as the honest limit of what the battery can handle. A 20A continuous limit on a 48V pack means you can pull roughly 960W of sustained output.
That is enough to power a 750W motor at full throttle on flat ground, but it will not be enough for a 1500W motor at sustained peak. If you try to draw more current than the BMS allows, the battery will likely shut down to protect the cells from damage. The BMS acts like a fuel line with a narrow opening, no matter how much fuel the engine wants, it can only get what fits through that specific width.
The battery comes with a 54.6V 2A charger, a battery holder, and two keys when you order from Amazon. The 2A charge rate is a major factor to consider here. Charging this large capacity from empty takes about 9 to 10 hours. This timeline makes overnight charging the only practical pattern for most riders. You cannot plug this in and expect it to be full before a quick morning ride.
Folding Design and Mounting Security
The physical form of this battery is a rectangular block measuring 14.1 by 5.31 by 3.54 inches. It weighs 10.52 pounds, which is a noticeable weight for a component meant for a folding bike. The design is specifically made to sit on a folding ebike rack mount. This mount includes a keyed security lock built directly into the frame. This allows you to remove the battery when you leave the bike unattended, providing a layer of security without having to install extra hardware elsewhere.
The size and weight dictate what kind of bike can use this effectively. Because it is a replacement pack, it is intended to fit into specific slots on existing folding frames. The 10.52-pound weight means that the bike remains portable but it is not lean. You will feel that extra mass when you are carrying the folded bike up stairs. The mount system is like a built-in holster for the energy source, keeping it rigid in place while you are in motion.
The inclusion of two keys is a small touch that helps if you lose the first. It ensures you are not locked out of your own power source. The holder itself is designed to integrate the lock with the frame, ensuring that the battery does not rattle or fly off over bumps. This is a focused design that ignores aesthetics to focus on the mechanical needs of a folding bike commuter.
Real-World Range and Power
Range depends heavily on how you ride, but the math for 960Wh is clear. On a 750W ebike, a 180 lb rider going at 15 mph on assist level 2 can expect to travel between 35 and 50 miles. This estimate assumes flat terrain and moderate temperatures. If you are using only the throttle, the range will drop because the motor works much harder. Cold weather also affects the chemistry of the lithium-ion cells, leading to lower performance in the winter months.
The power output is limited by that 20A BMS mentioned earlier. Since a 750W motor stays under the 960W limit, the battery can handle the load well. However, if your bike has a 1500W motor, the battery will struggle during steep climbs or rapid acceleration. The BMS will likely throttle the power or cut out to prevent the cells from overheating. This is a trade-off where you get high capacity at the expense of peak current delivery.
Charging speed is another consequence of the low-ampage charger, and it is a trade you accept against the cheap dollars-per-watt-hour that anchors this table of ebike batteries. Actually, keep it simple. The charging speed is another consequence of the low-ampage charger. Because the capacity is so large relative to the 2A output, it simply takes a long time to fill the tank. A 2A charger is like a slow hose trying to fill a large pool. It works fine if you charge while you sleep, but it is not a tool for the impulsive rider who needs a quick top-off before a long-distance trip.
What Amazon Reviewers Are Saying
This is a new Amazon listing with no public star rating yet. This means there is no feedback from hundreds of users to confirm the long-term reliability of these specific cells. You have to rely on the spec sheet and how similar 48V 20Ah folding packs behave in the real world. The listing provides the technical details, but the social proof is missing for now.
You should look at the manufacturer, Dongguan Yizhan Electronics Technology, and the offered one-year warranty. This provides a baseline level of protection, but it does not replace the peace of mind given by a long history of positive reviews. People who buy these types of generic batteries often look for reports on whether the capacity drops after six months of use.
Without a high volume of reviews, you cannot know if the mount is flimsy or if the BMS is perfectly calibrated. You are essentially an early adopter with this specific model. The price-to-watt ratio is attractive which attracts riders on a budget, but it carries a level of risk that higher-rated products do not have.
Who Should Buy This
This battery is for the rider who has a folding ebike and needs more range without spending a fortune. If you have a standard 750W motor and you mostly commute on flat ground, the 960Wh capacity is a great upgrade. It is also good for people who value the security of a keyed lock when leaving their bike in public spaces. If you can charge overnight, the slow charging speed is not a dealbreaker.
You should not buy this if you run a high-performance 1500W motor and expect peak torque every time. The 20A BMS will limit your performance and potentially cause battery shutdowns. You should also avoid this if you need fast charging capabilities, as the 2A charger is too slow for frequent short cycles. If you are someone who requires a history of thousands of reviews before purchasing, the lack of a rating on this listing will be a deterrent for you.
See the full listing on Amazon for current availability.
FAQ
How far will the LOCKBUS 48V 20Ah battery take me?
On a 750W ebike at 15 mph in assist level 2, expect roughly 35 to 50 miles from the 960Wh pack as a 180 lb rider on flat ground. Throttle-only riding and cold weather cut that number down. Steep hills reduce it further because sustained climbing pulls close to the BMS limit.
Does it work with a 1500W motor?
The listing says it fits 48V motors from 0 to 1500W, but the 20A BMS caps sustained output near 960W. A 1500W motor will run, yet it cannot draw its full peak continuously. Expect cutouts on steep climbs or hard acceleration. Treat it as a capacity upgrade for modest motors, not a power upgrade for big ones.
Why does the listing mention both a 20A and a 30A BMS?
The marketing copy and the spec table disagree. The spec table says 20A, so that is the figure to plan around. If the pack really had a 30A BMS, the extra headroom is a bonus, but you should not wire your expectations to marketing claims when the two sources conflict.
How long does charging take?
About 9 to 10 hours from empty with the included 54.6V 2A charger. That is the trade-off for a 960Wh pack at this price. Overnight charging is the practical pattern, and there is no indication the pack supports faster chargers.
Will it fit my folding ebike?
It is a replacement pack for folding ebike rack mounts, measuring 14.1 by 5.31 by 3.54 inches and weighing 10.52 pounds. Compare those dimensions against your current battery and mount before ordering. The keyed lock is built into the holder, so your mount must accept that style.