“Compatibility of Converter unit. Model DX-TADPCON Adapter Converter Combo Model : DX-TADPCON. On the instruction sheet, it is mentioned that the converter should be used only for short periods. Not exceeding 10 minutes. Does that means that I can not use it to charge a battery? It usually takes 1 1/2 hour to charge my battery on a regular electric outlet in Canada. If I can not use this unit, do you have an other product to propose? Thanks in advance for your reply.”