All LiPo battery packs must ship either UPS ground or USPS Parcel Select. NO EXCEPTIONS!
I occasionally have an opportunity to purchase LiPo packs in special sizes and generally do not buy them.
But these packs were available at a price I could not turn down, especially when these are the latest technology in 2S4P configuration. These are 2S packs in HV (max charge is 8.7v). A supplier purchased more cells than they could sell, and I bought the extra packs.
I was very impressed with their specifications, which I then validated on my West Mountain battery analyzer equipment. With 5100mAH capacity, tested at 130C, with dual sided 5mm bullet connectors and average 3.1mOHM IR, I was surprised. AND they are lightweight at average of just 203 grams. Dimensions: 95.1mm X 25.0mm X 46.2mm
Their capacity is ideal for 2 pole motors upto 8.5 winds in dirt oval and offroad, and will work very well with 17.5, 13.5, 10.5 classes.
NO ADDITIONAL hardware comes with these packs at this price. If you need new 5mm bullet connectors or charge cables, I have them here.