When you run a salon it is quite natural that the customers would be more on holidays and would be less on a weekday. It is also possible that even on weekdays, the peak hours like in the morning or in the evening, the customers are more. You could not keep the customers waiting until your smart razor is charged. At the same time, it is not advisable that you shave the hair on their body when the device is getting charged. So, the best solution is to buy the back shaving razor that has the battery life of three times the other razors that you get online.
It is important that the razor should at least serve one customer. While some customers have less hair, some have long hair. Hence, it is important that you have sufficient charge in your device so that the customer is not maid to wait when the shaving is in the middle. The customer could not go out nor could wait so long. He would get so annoyed that he would never choose your service again. So, it is always wise that you buy such a high end razor so that you do not lose your customers. Also, along with long life of the battery, it is good if you could pick the model that could be charged easily in no time.
This way, you could serve many customers. By the time one gets charged, the other one could be serving the customer already waiting their turn. So having said this, you could always place an order online since you would get multiple payment options of which credit card payment is also made available. Of course, the transaction done to buy multiple such razors for commercial use in your salon could be converted to easy installments thus lessening the burden during the initial stages.