● Use power bank (mobile power), DIY cheap uninterruptible power system ( UPS ) , it's cheap. save money.
(1) DT85C is: cheap/multifunctional/diy application platform ／strong enclosure, which can freely change the internal main control circuit board / module. (2) The price of DT85C is very cheap, only $ USD 7 (3) DT85C can be used as a power supply / or solar panel energy controller / or battery charger / or LED driver / or fan controller / or motor controller. (4) The internal main circuit board of DT85C can be replaced at any time without needing to buy an expensive power supply. (5) Suitable for various electronic modules and circuit boards, such as arduino / Raspberry pi / 3d print / senser / Experiment kit / Student internship / sample test / communications / step motor / solar panel / LED driver / battery charger / test PCB .. .. etc. (6) DT85C Use pp material that is resistant to fall, not acrylic material, acrylic is easy to break. (7) The transparent shell allows the user to know the contents of the display and the working status of the circuit board at a glance and real time. (8) pp material-strong enclosure , convenient for users to drill（diy), without breaking, unlike acrylic material, acrylic is very easy breaking when drilling. (9) The user is free to decide what area to drill, pp material, soft and strong, very suitable for drilling, not easy to break. (10) The powerful fan quickly discharges the accumulated heat of the circuit board to the outside of the casing, which can greatly improve the working efficiency of the circuit board (about 30%) (11) （Tool-free)Quick buckle box cover, vrry easy to replace the circuit board module, no need to remove the screws.
Other features of DT85C:
(12) DIY multi-function, user free wiring input/output
(13) Large, variable resistor (VR) can be installed, which is convenient for finger operation instead of tiny screws tiny screw is difficult to use.
(14) According to user needs, decide by user, use LED/LCD/TFT/OMLED... etc. display.
(15) A variety of quick connectors, directly connected to various power sources/or output sides.
(16) Tool-free quick connector, convenient and quick connection, no wiring, no other tools.
(17) Directly connect the battery through an electric clip for fast charging.
(18) Directly light up various LED lights/freely set the output voltage and current to drive the LED lights.
(19) (Input side) Can connect solar panels to charge the battery (output side).
(20) (input side) can be connected to the car cigarette lighter to charge 3C products (output side).
(21) (input side) can be connected to a mobile power supply to charge the battery or light up various DC lights (output side).
(22) The product is light in weight and easy to carry.
(23) Fall-resistant product shell, strong and durable.