Spektrum Smart LiPo G2 packs add convenience features (like Smart data and improved storage handling), but they're still lithium polymer batteries and can develop swelling ("puffing") if overstressed, over-discharged, stored hot, or charged improperly. Once a pack swells, replacement is usually the safest choice rather than repair, because internal damage can worsen and increase fire risk.
The decision point is less about cost and more about safety: if the case is bulging, voltage is inconsistent between cells, or the pack gets unusually warm, retire it. Preventive habits-proper storage charge, avoiding deep discharge, and using correct charge rates-extend life and reduce swelling risk.
Pricing reflects common Spektrum Smart G2 hardcase pack pricing in U.S. hobby retail, rounded to a representative mid-pack option; capacities and C-ratings vary widely across the line.