The Lithium Hellas 36V 20Ah battery has been designed for anyone who is looking to replace their old lead-acid batteries for a more efficient and durable lithium-ion alternative. Most people buy this battery to replace their old lead-acid batteries because it is so much lighter and has a much higher discharge rate than lead-acid batteries.
At 120 dollars, it is priced competitively for a 36V 20Ah pack with US stock shipping. Amazon reviewers give it 5 stars across its early reviews, and the use cases they describe range from kids' performance bikes to daily riding setups.
The 36V Case
Most ebike content revolves around 48V and 52V builds. However, there are a number of ebikers using 36V systems. Some examples include the original Razor MX650 and SX500 builds which both utilize 36V motors. Many entry level commuter ebikes come with 36V controllers. There are many electric scooter models that use 36V and even some golf cart accessories use 36V. So, if you fall into any of those categories, this Lithium Hellas 36V 20Ah will be a great drop-in solution to your existing lead-acid battery. The 1500-cycle claim also compares favorably to sealed lead-acid cells that typically last 200 to 400 cycles before noticeable capacity loss, making the lithium option the better value over the lifetime of the battery.
Specs at a Glance
- Voltage: 36V nominal
- Capacity: 20Ah (720Wh)
- Chemistry: Lithium-ion
- BMS: 30A built-in
- Charger: 42.2V 2A included
- Connector: T-Plug
- Estimated range: 35 to 50 miles
- Cycle life: 1500 cycles claimed
- Compatible: Universal 36V systems
Charging
The 42.2V 2A charger that comes with this battery is the right size for a 36V lithium pack. It takes approximately 10 hours to fully charge from empty. While 2A is slow, it is safe. If you would like to charge this battery faster, you can find compatible 3A or 5A chargers online. Make sure to check with the seller that this charger will work with your new lithium battery.
BMS Performance
The 30A BMS in this battery provides protection against overcharge, over-discharge, overcurrent, and short circuit. Several Amazon reviewers have praised the BMS as a major reason for feeling confident about the long-term safety of this battery. One reviewer noted that the 30A BMS gave them peace of mind concerning both the safety and the longevity of their daily setup.
Compatibility
Lithium Hellas sells this battery as a lead-acid replacement and it fits that description perfectly. If you have a 36V system now that consists of three 12V lead-acid batteries connected in series, this battery is the perfect replacement. Since the connector is a T-Plug, you may need to purchase an adapter to connect it to your current wiring harness.
Range and Real-World Use
The estimated range of 35 to 50 miles per charge based upon a 720Wh battery is very reasonable. The Lithium Hellas range estimate was spot on when several Amazon reviewers discussed their actual usage.
One reviewer mentioned they installed this battery in a Razor SX500 and ran a 36V 1000W controller that was overvolting at 48V output with a 36V 650W brushed motor. Their 60-pound daughter was able to ride at 25 mph using the stock gearing and additional torque provided by the new battery. After a nine-mile ride almost completely at full throttle, the battery had 35 to 40 percent remaining. That is pretty close to what the manufacturer was estimating.
Who This Battery Is For
The Lithium Hellas 36V 20Ah is targeted towards a specific type of rider:
- Anyone replacing dead lead-acid batteries in a 36V ebike
- Razor MX650, SX500, or similar platform builds
- Owners of electric scooters that use 36V systems
- Golf cart accessory upgrades
- Riders seeking a lightweight lithium option without upgrading their entire 36V drivetrain
If you have a controller that is rated for 48V and would like to step up to the 48V 20Ah version of the same battery, it may be worth considering since it would provide more power for the motor. See the full battery comparison table to weigh your options across voltages.
What Amazon Reviewers Say
There are few Amazon reviews for this product, but every single review is 5 stars. The comments provided by the reviewers fall into two categories: excellent performance in kids and custom builds, and confidence in the BMS protection for long-term use.
One reviewer described how much more torque was developed and how the range of their Razor SX500 improved with the installation of this battery. They were impressed enough with the performance that they went through the trouble of writing a detailed post describing their experience. The reviewer that praised the BMS said they felt confident in the safety features of the battery due to the BMS. Both of these reviews indicate that the battery performed exactly as specified and did not sacrifice quality for price.
Pros and Cons
Pros:
- 720Wh for 35 to 50 miles of range on 36V systems
- Ships from US stock for fast delivery
- T-Plug connector for easy integration
- 42.2V 2A charger included
- 1500 cycle life claim
- Good BMS performance reported by Amazon reviewers
Cons:
- 36V is a narrower compatibility range than 48V
- 2A charger is too slow for a 720Wh battery
- Very limited review count at launch
FAQ
Can I use this battery on a 48V system? No. A 36V battery should never be connected to a 48V system. Doing so may cause damage to either the battery or the controller. If you have a 48V system, look at the Lithium Hellas 48V 20Ah model instead.
What connector does it use? It uses a T-Plug, also known as a Deans connector. Adapters for connecting to Anderson, XT60, and other common plugs are widely available online.
Is this a direct replacement for lead-acid batteries? Yes. If you have a T-Plug or can purchase an adapter to fit your existing connector, it will be a direct replacement. Three 12V lead-acid batteries in a 36V series configuration weigh approximately 10 pounds each. This pack replaces all three with a single unit that weighs a fraction of the weight of the original.
What range should I expect? Several Amazon reviewers have reported actual ranges consistent with the manufacturer's estimated range of 35 to 50 miles. Heavier riders on steeper inclines with high power settings will see less range. Smaller riders on flat ground at medium assist levels will likely get closer to 50 miles.
Does it ship from the US? Yes. Lithium Hellas states that this is a US Stock item, which means you will receive your battery sooner than if it was being shipped from overseas.
Can I replace the charger with a faster one? The included 42.2V 2A charger is the correct size for this battery. Compatible 3A or 5A chargers can charge this battery much quicker. Before purchasing a faster charger, confirm that the specs match the specs of your battery.
Does this battery work on a standard 36V brushless hub motor? Yes, any standard 36V hub motor and controller combination will be compatible with this battery without any modifications. The full charge voltage of 42.2V is within the acceptable tolerance range for most 36V motor controllers. If your system is using 36V nominal lead-acid and you want to go lithium, this will be a perfect drop-in replacement that will feel much lighter.
How much lighter is this compared to the lead-acid setup it replaces? Three 12V lead-acid batteries in a 36V series arrangement typically weigh between 8 and 10 pounds each, totaling 24 to 30 pounds for the full set. A lithium-ion pack of this capacity weighs significantly less than that combined figure. That weight reduction makes a real difference in handling and frame stress, particularly for smaller kids' bikes or scooters where the battery weight represents a substantial share of the total vehicle weight.
Compare all 36V and 48V options side by side on the full table.