Which 36V lithium battery to choose? I paid for OKMO after 8 months of testing.
A golf club in the south did three years of site management, I have handled no less than 20 brands of lithium batteries. Last year, the club to upgrade 36V ball car battery, I led the team to test the market mainstream 6 brands, and found that the lithium battery this line of water than the golf course of the water barriers are deeper - some of the brand parameters false labeling 30%, some with recycled battery core to the second best, the most outrageous is the net red brand warranty period directly out of touch. Today we put aside the marketing rhetoric, talk about the real 36V lithium batteries to carry the field of battle.

First, the three major life and death line of lithium battery purchase
Look at lithium batteries can not just stare at the capacity parameters, the three hidden indicators is the key to life:

Cycle life do not believe the laboratory data: a major international brand labeled 2000 cycles, measured in the 45 ℃ high temperature environment, 800 times after the capacity fell to below 70%. It is recommended to directly let the manufacturer to provide the real use report of users in the same latitude area.

BMS system determines the life and death: last year's rainy season, there were a batch of batteries because the waterproofing was not done properly, the BMS motherboard directly soaked in water and short-circuited. Now we will use high-pressure water gun to simulate rainstorms direct battery compartment for 3 minutes, through this level of only 3 brands.

Low-temperature performance to be verified in the field: Northern customers feedback, a best-selling brand in the -5 ℃ environment range directly cut. Later dismantling found that they use cheap NMC622 core, low temperature characteristics are far less than lithium iron phosphate.

Second, the five brands tested red and black list
We took the real ball car to do 8 months load test (load weight 260kg, average daily driving 23 kilometers), the data speak:

Brand Nominal capacity Measured attenuation Temperature adaptability Warranty package

I especially want to complain about the “Lifetime Warranty” of a popular brand - it requires quarterly uploading of usage data, and if you forget to upload it once, it will be null and void. In contrast, OKMO's policy of “compensating for any damage” is much more realistic. Last month, a billiard truck tipped over and deformed the battery shell, and they really brought new batteries to the site for replacement.

Why OKMO is the final lock
The traceability of battery cells is visible: they dare to synchronize the factory inspection report of each battery cell to the small program, which even many international brands can not do. We have sampled three batches of goods, the measured capacity error is within ± 1.5%.

Intelligent temperature control black technology: minus 20 degrees environment actual test, range is only 13% less than room temperature. Disassembled and found that they have installed an independent heating film for each electric core, the cost of blood.

Reverse compatibility trick: the old ball car modification is most afraid of line matching problems, OKMO's engineers with adapters on-site debugging, even the 1998 vintage ball car can be perfectly compatible with the service is really convincing.

Last week, I just signed an annual purchase contract with OKMO for 30 sets of batteries, and it is calculated that each set of batteries can save 4000+ maintenance costs in five years. To be honest, in this mixed market of lithium batteries, OKMO is the most honest domestic brand I've ever seen that dares to use military-grade IP67 protection + vehicle-grade BMS. Preparing to modify the ball car friends, it is recommended to directly ask for their “36V battery modification white paper”, which even different terrain tire pressure on the range of the impact of the measurement of a good, this kind of detail control deserves their money.