ChiBatterySystems Gen 2 Gladiator Upgrade: A Real-World Sur-Ron Battery Boost (and a Look Inside Their Shop)
January 6, 2023
If you ride a Sur-Ron (or any light EV that gets ridden hard), you already know the battery is the whole personality of the bike.
I recently got hands-on time with ChiBatterySystems again—this time around their newer Gen 2 battery platform—and I also spent time with their Gladiator 66 Compact Sur-Ron pack. Between how they’re building these things now and what that extra voltage does on the trail and on the street, it’s one of the more meaningful “it actually feels different” upgrades I’ve tried.
Below is the real-world take: fitment, usability, what I liked on the ride, and what I’d want you to think about before you spend the money.
First impression: it feels like a more “finished” product
A lot of aftermarket batteries work, but they can still feel like a custom project.
The Gen 2 direction here feels more like a mature product line: cleaner enclosure work, a more refined layout, and details that seem like they came directly from riders breaking stuff (or wearing stuff out) and then asking for it to be fixed.
One example I immediately appreciated: the discharge lead location. Chi moved the discharge leads to the top on these newer packs, and in day-to-day use that just makes sense. Routing feels less forced, fitment is cleaner, and it should reduce long-term wear versus leads that have to fight for space.
Install experience: still “drop-in,” but plan for a small mod
The Gladiator 66 Compact is designed to retain drop-in functionality, but it does require a simple lid modification.
That’s important to call out because “drop-in” can mean different things depending on the brand. In this case, I wouldn’t classify it as a full fabrication project, but I also wouldn’t tell someone it’s a completely tool-free swap.
If you’re comfortable doing normal Sur-Ron tinkering, the install is straightforward. The biggest win is that once it’s in, the bike still feels like a Sur-Ron—just with a stronger heartbeat.
On the ride: the bike feels more awake everywhere
The reason people chase voltage upgrades is simple: responsiveness.
With the 66V setup, I felt that extra urgency the moment I started riding. The bike reacts more quickly to throttle input, and it carries speed with less effort. It’s not just about a top-speed number—it’s how easily it gets into the power and how it holds that power when you’re asking for more.
The big practical benefit is that it makes the bike feel less “on the edge” when you’re riding faster sections or punching out of corners. Instead of wringing the bike out constantly, it feels like there’s more overhead.
Chi positions this pack as a way to take advantage of the extra tolerance in the stock controller. If you’re still on the stock controller, that’s a key part of the appeal: you can get a meaningful bump without immediately committing to a full controller swap.
And if you already have an upgraded controller, this battery is built to give you a lot to work with. Chi calls out 22 kW of real-world continuous power (using 21700 Molicel cells). I’m not going to pretend I’m out there measuring kilowatts on every rip, but what I can say is that the bike feels noticeably stronger and more consistent when I’m riding it like I mean it.
Living with it: durability and reduced “little failure points”
One of my bigger takeaways wasn’t even the extra punch—it was the mindset behind the Gen 2 platform.
Chi put effort into reducing points of failure and making the pack more robust. They’re using a PCB approach (instead of more fragile/complex interconnect setups), and they’ve pushed into more repeatable manufacturing methods (including injection-molded parts) so the fit and finish stays consistent.
For me, that matters because the battery isn’t a shelf accessory. It’s the part you’re constantly removing, reinstalling, charging, and trusting not to get weird on you.
Also worth highlighting: they’ve built in an intelligent display so you can see a lot of data right on the pack before you ever open an app on your phone. I’m all for phone-based data, but I’m even more for quick checks that don’t require pairing, digging through menus, or hoping my phone battery is alive.
A quick note on Chi as a company (and why I care)
I’m always cautious with battery brands because you’re not buying a simple bolt-on part—you’re buying a potentially hazardous energy storage system.
What stood out to me is how much of their process is brought in-house. They’ve invested in equipment that supports repeatability and control (like their fiber laser for enclosures and a copper welder for better pack construction). And because quality control is the entire game with lithium packs, having production centralized matters.
I also like that they clearly pull feedback from riders and then make practical changes—like the lead relocation and enclosure refinements—rather than just throwing marketing terms at the same old product.
What We Like
The 66V upgrade makes the Sur-Ron feel more responsive and eager without changing the core character of the bike
Designed to take advantage of extra tolerance in the stock controller, which can be a sweet spot for a lot of riders
Gen 2 enclosure and layout changes (like top-mounted discharge leads) improve fitment and reduce wear points
Intelligent display gives useful info without relying on a phone
A clear focus on reducing failure points and improving durability
Things To Consider
“Drop-in” includes a simple lid modification—plan a little time and be honest about your comfort level
More power means you’ll find weak links faster (tires, brakes, drivetrain, and your own self-control)
If you’re chasing maximum performance, your controller setup and tuning will still matter a lot
Final Thoughts
If you want your Sur-Ron to feel stronger in real riding—not just on a spec sheet—the Gladiator 66 Compact is the kind of upgrade you notice immediately. The bike feels more awake, carries speed with less effort, and responds more sharply to throttle input.
What makes it stand out for me is that it doesn’t feel like a random aftermarket science experiment. The Gen 2 platform feels more refined, more rider-informed, and more built for long-term use.
If you’re ready to spend real money on the part that defines how your Sur-Ron rides, this is a legit direction.
Links
ChiBatterySystems (discount link): https://chibatterysystems.com/?ref=KcwIhYRqEg8OK (Promo code: RUNPLAYBACK)
RunPlayBack Merch: http://shop.runplayback.com/