A common obstacle for every jetson haze owner sooner or later. The original battery loses its ability to hold a charge, the battery life diminishes and your commuting bike becomes an immovable object. The Smseler 48v 7.5Ah ebike battery is designed specifically to address that. It is a tool-free solution and requires no wiring or technical expertise to install into the haze frame.
Replacing a battery is always a gamble. Some have incorrect connectors. Some don't fit properly into their mounts. And there are even some that pose Safety risks. This one is for the Jetson Haze HA318, so the primary focus is ensuring a good fit. There are several aspects of this battery prior to purchasing that we will cover below.
Specifications and Build Quality
First things first, let's go over the specifications and build quality. As we've said many times before, specifications are important and speak volumes. This is a 48v, 7.5Ah (amp hour), 360wh (watt-hour) pack. While it may seem like low capacity, given the small motor size and weight of the jetson haze, it is reasonable. The dimensions of the pack are 13.39" x 3.74" x 2.2", and it weighs 5.84 lbs. The narrow design allows it to easily fit into the limited space available on a folding bike with a sliding mechanism. Simply align the pack with the rails and apply pressure until it locks in. Once locked in, simply pull the release latch and the pack slides out for charging. Since this pack is meant to be installed and removed quickly and easily as a commuter who stores the pack in his/her apartment at night, being "tool-free" is the purpose behind this design.
In terms of build quality, it meets what you'd expect for a product at this price point. The outer casing is solid plastic with a seamless finish. Additionally, the rails for sliding the pack in/out are smooth right out-of-the-box. Overall, nothing seems flimsy or rickety, especially since this bike is often stored/folded/unfolded multiple times a day. Even better, the release latch clicks positively once you ensure the pack is securely seated vs. Loosely sitting in the rail.
It supports motors ranging from 120w to 500w, covering most small folding ebikes such as the jetson haze. Output-side has a five-pin connector along with a dedicated DC charging port. Take note of this fact as you determine if you already own a compatible charger, since you'll require a matching plug to utilize this pack. For comparison purposes, we break down larger-capacity options within our ebike batteries guide.
BMS, Safety, and Other Features
The bms (brain management system) for this pack consists of 30 amps with multi-layer protection. It monitors your pack for overcharge, deep-discharge, short-circuits, temperature extremes, etc., cutting power when a threshold is reached to protect both your cells and your ebike. For an ebike whose battery resides under your stairs in a folded state, having peace of mind regarding Safety is crucial.
Don't confuse that protective aspect of the bms with a performance component. The bms protects your pack, it doesn't supply additional power beyond what your motor requires. Therefore, if you're running a large 750+ w motor, you'll likely need a pack capable of providing more headroom than this option offers.
The compact foldable nature of this pack provides significant advantage over stiff downtube-type packs that cannot accommodate frames that collapse in half. All aspects of this pack from the slide-rails to the release-latch were optimized for quick exchanges at the conclusion of each ride. We have provided coverage for numerous alternative battery options on our website and this product earns a place on our shorter list of preferred products for folding ebikes.
What Amazon Reviewers Are Saying
At the moment, there are only Two customer reviews posted for this product on amazon, therefore, consider them as a sample size rather than conclusive proof. Both reviewers gave the product 5-star ratings, however, while this is an optimistic sign, it does not represent overwhelming evidence either.
The honest assessment is that this is an extremely new listing with a clean slate versus an established product with extensive user experience.
New customers praise the fit above all else. The battery fits into the haze frame without modification, and that is precisely why a Replacement battery has to fit correctly to begin with. No one wants to cut away plastic or wire in their garage at midnight to make a Replacement battery work.
Set realistic expectations. Two reviews indicate that early customers received functioning units upon arrival, they do not indicate how well this pack performs after one year of daily use and/or extended travel. That decision remains pending, thus consider this factor in addition to cost before deciding to purchase.
Who Should Purchase This Battery?
This product is ideal for jetson haze owners who need a functional battery and do not wish to turn their bike into a diy project. Check the Smseler replacement battery on Amazon to see current pricing and availability. If your original battery can no longer retain its charge, this slide-in Replacement enables you to resume riding your bike immediately. In addition, it serves as an excellent spare for anyone seeking to possess an emergency battery for longer trips or extended travel.
However, it may not be ideal for everyone. If you own an ebike that utilizes an excessively powerful motor (i.e., >750 watts), seek alternative solutions since this battery was created with smaller commuter-class bikes in mind. Furthermore, if you prioritize range above all else, consider larger amp hour batteries as well.
Match your battery with your bike, and you will be satisfied. Commuters who plan on transporting cargo or traveling long distances (up steep inclines) frequently should reconsider their selection as well, due to this battery's emphasis on compactness/lightness as opposed to pure longevity.
For commuters using a folding bike near their residence that rarely travels far from home, this size represents a reasonable middle-ground between usability/convenience and sufficient energy to meet your needs throughout the day. It recharges rapidly. It is light enough to transport. And it fits into the frame for which it was originally designed perfectly. That is the sole objective of this product and it achieves that goal efficiently.
Frequently Asked Questions
Will the SMSELER battery fit my Jetson Haze?
It is made for the Jetson Haze HA318 (Model PJHAZE-BTK) and similar folding frames with the same slide-in compartment. Measure your battery bay against the 13.39 x 3.74 x 2.2 inch dimensions before ordering to be sure the rails line up.
Does it come with a charger?
The pack ships with a five-pin output and a separate DC charging port. Confirm whether a matching charger is included in your specific listing, because the pack relies on a plug that has to line up with the port on the case.
What motors does this battery support?
It is rated for 120W to 500W motors, which covers the small commuter-class folding bikes this pack is built around. Going much beyond that range runs up against the limits of the 30A BMS.
How is the battery secured in the frame?
A tool-free slide-in mechanism locks the pack into the rails, and a release latch lets you pop it back out for charging. There is no wiring involved, which is the whole point of the design for a fold-and-store commuter.
Is 7.5Ah enough range?
For a short commuter bike, 360Wh is workable for a daily round trip if you are not climbing huge hills. Riders who need serious range will want to step up to a larger pack, since this one favors compactness over raw capacity.
How long does the battery last?
Cell longevity depends on charge habits and storage temperature. The 30A BMS guards against overcharge, deep discharge, and heat, which all help extend the usable life of the pack over time.