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BMS 4S 14.8V 30A Li-ion Lithium 18650 PCB Battery Charge Protection Board with Balanced 12.8V Lithium Iron Phosphate HX-4S-F30A
Quick answer
Is $3.40 a good price for BMS 4S 14.8V 30A Li-ion Lithium 18650 PCB Battery Charge Protection…?
It is the usual price, not a deal: $3.40 is in line with the typical price of $3.40 that DipScout measured over the last 14 days. It is the lowest in 19 days, but it has held this price since Nov 2, 2026.
$3.40
Today it costs $3.40 on AliExpress. Since Oct 23, 2026, when we started tracking it, it ranged from $3.40 to $5.39. It's the lowest price in 19 days, but it has been at this value since Nov 2, 2026; by our price history that is already the normal price, not a sale.
Drop detected on . Price last re-checked on .
No drop compared with what we observed over the last 14 days. The store advertises "was $5.44", but that is the store's own claim; we only state discounts our price history proves.
View on AliExpressThe price above is the last recorded reading, not a live checkout lookup.
Price history
Today$3.40lowest ever seen
Lowest$3.40since Nov 2
Highest$5.39Oct 29 to Oct 31
Tracked since Oct 23 · 5 changesHover over the chart to see each price.Tap the chart to see each price.
See every price change
| When | Price | Change |
|---|---|---|
| Nov 2, 18:04 UTC | $3.40 | −16% |
| Oct 31, 12:03 UTC | $4.05 | −25% |
| Oct 29, 07:03 UTC | $5.39 | +33% |
| Oct 28, 05:04 UTC | $4.04 | −1% |
| Oct 24, 00:06 UTC | $4.09 | +1.0% |
| Oct 23, 02:01 UTC | $4.05 | start |
| Store | Relax Goal DIY Electronic Store |
|---|---|
| Positive feedback (AliExpress) | 84.7% |
| AliExpress category | Electronic Components & Supplies › Active Components |
| Recorded readings | 6 |
| First seen | |
| Last reading |