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A: No. The standard BST900W does not support parallel operation. Doing so will destroy both units. Check your specific revision – some "Pro" models allow it, but the base manual forbids it.
A: Normal. The BST900W continues cooling internal components until temperature falls below 45°C (113°F). This can take 2-5 minutes. bst900w manual
Even if the LCD shows 3 bars, the manual insists on a full charge. Plug into wall AC for 6-8 hours. The indicator will show "100%" or "FULL". bst900w manual
A: No. The standard BST900W does not support parallel operation. Doing so will destroy both units. Check your specific revision – some "Pro" models allow it, but the base manual forbids it.
A: Normal. The BST900W continues cooling internal components until temperature falls below 45°C (113°F). This can take 2-5 minutes.
Even if the LCD shows 3 bars, the manual insists on a full charge. Plug into wall AC for 6-8 hours. The indicator will show "100%" or "FULL".