Be warned that this company does not value their customers. The battery is top notch, but the cartridges are defective. I buy in bulk and purchased 10 Indigo cartridges from The Farm in Boulder, sadly upon returning home, I had to add 4 defective cartridges (4 out of 10) to previous defective cartridges. How did Airo Pro respond? They sent me not once, twice, but three times over 30 hours on the road for a package that did not exist. AiroBrand's Vice President of sales and distributions deceived me into believing that he had spoken with the negligent retailer, High Country Healing, in Alma, CO. The retailer, High Country Healing, Alma should also be avoided. As the manager laughed at me after driving 5 hours, telling me they have never spoken to AiroBrands and that the letter written by AiroBrands VP was likely a fake. Don't forget that AiroBrand's VP of sales and distributions offered a direct number which he refused to answer for either me or retailer. The company did not even accept my offer of batch numbers for defective products. Don't you think that AiroBrand's would like to know that they have defective merchandise and how to track it, but No; they rather leave it on the shelf for out of state visitors that are unlikely to return. Retailers beware of how Airobrand's continues to contribute to poor customer experiences at your fine establishments. I can tell you, that if I walk into your stores and see Airo Pro, I'm walking right back out and telling and showing any customer's of your choice in carrying discreditable unethical merchandise (Airo Pro) from unprofessional manufacturer's concerned only for profits and not customer well being and satisfaction.