HALTER MPD7: Battery holder for 2x 18650 at reichelt elektronik
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High Performance DIY 4 Slot Button Battery Holder Protection Box for 18650 Sale, Price & Reviews | Gearbest
2pcs 18650 4 battery holder Case for Li ion batteries holder case 7.4v 18650 2S2P with Build in PCM Protection Circuit Module|battery holder case|4 battery holderbattery holder - AliExpress