If raw range is the spec you chase, the Seenrongyuan 52V 25Ah sits near the top of the market: 1300Wh in one pack against the usual 500 to 700Wh. Exactly one buyer has reviewed it, awarding 5 stars. That is a blank slate, and this review treats it as one.
Specs and Value
The key specs of this battery pack include a 1300Wh rating which is far higher than virtually all standard battery packs. Most ebike battery packs tend to reside in the 500, 700 wh area. The capacity comes from pushing the amp-hour rating to 25Ah, and physics charges a toll in weight.. More weight stresses tires and suspension, and you will feel it on hills.
Design and Mounting
The physical dimensions of Seenrongyuan’s design is larger than the standard water tube battery pack. Included in the design is a lock mechanism that secures the pack to the frame. For the added convenience of charging your smartphone while riding, Seenrongyuan includes a USB port. Also, an LED indicator displays the remaining charge. Before purchasing, measure your battery compartment. Due to the size of the pack, it is possible that you will require an additional Mounting bracket or custom rack. Since the weight of this battery pack is so large, placing it high on the frame will negatively affect handling. Move it down as close to the center as possible.
For securing this large battery pack to the frame, it is critical that you utilize a sturdy Mounting system. Use thread locker on the bolts holding the Mounting bracket to your frame and reinforce them. Over time, vibrations from the road will loosen the connection, resulting in loss of contact and potential damage. The lock prevents a casual theft at a coffee shop, but does nothing to prevent a thief with tools from stealing your bike. Unplugging any attached accessories prior to parking will eliminate drain on your cells via USB.
Range, Power, and the 50A BMS
At optimal operating conditions, 1300Wh yields ranges well beyond 100 miles. Wind resistance, speed, and the weight of the pack reduce these estimates considerably. Regardless of the factors mentioned previously, the margin of excess storage over a standard pack remains huge. Running at 52 volts instead of say 36 volts reduces required current for equivalent power, therefore reducing heat generated within both the motor control wiring and controllers.
Of significance regarding the BMS (battery management system) contained within this unit is that it can support motors of up to 2000 watts. Many BMS systems (of poor quality) are limited to supporting motors of less than 1500 watts. These poorly engineered systems often cause reduced performance when riding uphill by limiting how much power the motor can deliver when climbing steep grades due to excessive current draw reducing voltage levels.
You should also understand that when riding uphill at full throttle, voltage drops quickly when drawing a lot of current from your battery pack. A rider may think he is running out of battery reserve rapidly despite his charge level showing 75 percent or higher. Dropping voltage while accelerating feels just like a reduction in capacity even when there is sufficient reserve in your battery. If you are building an ebike for speed, choosing a quality BMS matters as much as selecting quality cells. it controls how much stored energy becomes accessible.
What Amazon Reviewers Are Saying
There is only one review. That review is five star. Thus, the entirety of this review history consists of one review. No one knows how the cells will perform after 100 charge cycles and neither the buyer nor anyone else knows how this cell will react to heat stress or winter weather conditions. Just as there always exists an unknown variable when buying products from an unproven company, there also exists an unknown variable when buying products from unproven companies relating to long-term durability.
Buy now and you’ll be the guinea pig for better or for worse.
Who Should Buy This
Purchase this product if extreme range trumps brand risks or if you charge rarely and ride long hours or if you’re a DIY builder comfortable troubleshooting electrical issues.
Don’t purchase this product if you want an established brand name guarantee, hate uncertainty, or prefer agility over range. The added weight of this battery pack changes how your bike handles.
Compare it against others in our ebike battery comparison chart or search through gomotorbikes blog.
Check the latest price on Amazon.
Frequently Asked Questions
How Large a Motor Does This Battery Support?
This battery supports hub motors ranging from 200w to 2000w. That’s a fairly wide range since you could install a small commuter hub motor into it but also some really powerful high speed motors. Your problem is likely to be finding a controller rated at 50A (or lower) if you wish to reach the high end of this motor.
How Far Will a 52V 25Ah Battery Take Me?
Distance varies with how aggressively you ride your e-bike. your weight. the grade (steepness) of your route. and how reliant you are on assist vs. Throttling. For example, a motor drawing 750W continuously empties the pack in under two hours of pure throttle. Pedal between assist bursts and you will see better mileage than anticipated. Overall, this pack supports genuinely long rides, assuming reasonable expectations.
How Do I Interpret 1300Wh?
1300Wh simply refers to the quantity of watt-hours (usable stored energy) found in this pack. Multiply volts x amp-hours together to determine watt-hours. The math: 52V times 25Ah equals 1300Wh. This pack carries roughly double the watt-hours of a typical 48V 13Ah pack. And that's why this pack is appealing to those seeking extended distances before requiring another recharge.
Will the Battery Come With a Charger?
The standard package includes the battery, a bracket, a male XT-60 connector, and two keys. It seems like a charger would be necessary in order to charge your existing ebike's charger or buy a separate compatible 52Volt charger. Check the details section for specifics to confirm.
Is the Battery Waterproof?
The plastic housing surrounding the battery is considered waterproof. This is beneficial in cases where you ride in wet weather conditions or clean your ebike regularly. Keep in mind however that while the housing may be waterproof, the connectors remain somewhat exposed and therefore warrant special care.
Should I Worry About Only One Review?
What should my concerns be due to only having one review? There is merit in asking this question. Consider that in instances where there is only one review (in addition to a perfect score) for a new item, there isn't historical data referencing how well that product performs relative to other products.
Since no prior reviews exist for this product line from which to base comparisons. your decision will primarily revolve around product specifications and product information provided by sellers through their listings. As such, there are two different possibilities regarding your decision-making process. On the plus side, there aren't any negative reviews with which to compare your decision. On the downside, there is minimal to no knowledge regarding whether this specific model of a product has exhibited consistent reliability over time based upon customer experiences.
Therefore, if reliability is something you're concerned about, it might be wise to wait until there is some kind of track record of performance. If you accept first-mover risk and the product meets its stated specifications. then it's certainly worth consideration.