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Would four 9V batteries in series with ground drawn from the middle supply enough current?
by nitrogen 5y ago
Would four 9V batteries in series with ground drawn from the middle supply enough current?
- tuatoru 5y agoEnough current for what? Power = voltage x current = (voltage) squared / resistance. The little rectangular 9V batteries have very high internal resistance as well as low energy capacity. The nominal 9V can easily fall below 6V with heavy loads. If you only need 1 watt (times 2 for stereo), loud enough for average rooms with speakers of reasonable efficiency, then one 9V battery would be enough. It wouldn't last long though. With two in series you can go louder, provided the amplifier is rated for the higher voltage. Remember to put fuses in your power leads (except the ground return). Good quality batteries can get hot trying to power a short circuit.