Instruct: Classify Amazon reviews into positive or negative sentiment
Query: exploded, so sent it back

After a short time of usage of this underpowered device, the string spool and its covering exploded off and parts were lost making it impossible to reassemble. I sent it back for a full refund. I bought an earlier model of a Black & Decker cordless rechargeable trimmer in 2000 that was better powered and better built. Its rechargeable battery finally would not accept a charge anymore and was an integral part of the device so wasn't replaceable, leading to the current unfortunate purchase.