I have a piece of electrical equipment that uses a 12v DC in that i want to replace with a battery, as it currently uses a wall charger with an AC converter. How would i go about doing this for cheap? making it myself wouldn't be out of the question, all i need is a guide. The 12v pack must also be as small as possible, as it is powering a portable device.
It relies upon what form of battery it is. Lead acid batteries (vehicle batteries) are extremely indestructible, yet nonetheless incorrect charging could nicely be risky by way of fact it may launch hydrogen gas it extremely is a fireplace of explosion possibility in restricted area. Over charging at a extreme fee could additionally overheat the battery and bodily harm it. best is a appropriate battery charger. a inexpensive charger could fee no longer extra effective than a mains adaptor besides. For different varieties of rechargeable battery you easily decide for a appropriate battery charger, or you will harm the battery in a small form of expenditures (in the worst case, the 1st time you attempt to fee it). If the device is often used the place there's a mains poiwer furnish, why no longer basically use a DC adapter particularly of the battery? to respond to your particular questions a million) confident. 2) No. forget approximately with regard to the advice in yet another answer approximately restricting the present with a diode. in case you knew adequate to layout your person battery charger suitable, you probable does no longer be asking this question!
You want to replace a battery charger with a battery? Makes no sense. 12V is quite a voltage - you need 8 1.5V batteries, or a 9V and 2 1.5V batteries, but that only take scares of voltage. You also need POWER (amps). Say you power 20 W of speakers, that requires about 1.6 A - not a trivial current for common batteries. Think car battery (which is not very portable )
I would find what signal would tell the amp to go into low power mode, and force that into the high power state. One possibility is the subwoofer amps are powered only by the AC charger, in which case you could re-wire their power so they get it from the built in battery. As for actual external power, you can use a couple appropriate RC packs, or a 12V SLA type battery.
