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What Battery Replaces A Continental 2GC=8V Model?
The Continental 2GC=8V battery can be effectively replaced by 7.4V LiPo battery packs configured as 2S (two-cell series) lithium-ion systems. At full charge (8.4V), these closely match the original 8V output while offering higher energy density. For high-drain applications like RC vehicles, the BT 8500mAh 2S 80C LiPo (7.6V nominal) and similar models provide 30% greater capacity than standard lead-acid equivalents. Always verify connector compatibility—XT60 or T-plug variants are common replacements.
What voltage specifications define a proper 2GC=8V replacement?
Look for nominal 7.4V-8.4V lithium systems with ≤2% voltage deviation under load. While labeled as 8V, lead-acid versions typically operate at 7.2-8.1V, making lithium’s 7.4V-8.4V range ideal. Pro Tip: Use lithium batteries with built-in voltage regulators if the device lacks overvoltage protection circuits.
Traditional 8V lead-acid batteries exhibit a steep voltage drop—from 8.4V fully charged to 7.2V at 50% discharge. Lithium replacements maintain 7.4V±0.2V across 80% of their capacity. For example, a BT 5200mAh-2S-60C pack delivers stable 7.4V output until the final 15% discharge. Warning: Avoid using 3S (11.1V) packs—their 12.6V peak charge would damage 8V-rated systems.
How do physical dimensions compare between original and replacement batteries?
Most 2S LiPo replacements are 20-30% smaller than legacy 8V lead-acid units. The Continental 2GC measures ~150×85×95mm, while BT’s 8500mAh 2S LiPo is 135×45×65mm—requiring spacer foam for secure installation. Verify terminal spacing: original 8V models use 19mm post centers vs. 10mm bullet connectors in lithium packs.
| Parameter | Continental 2GC | BT 2S LiPo |
|---|---|---|
| Weight | 2.1kg | 0.7kg |
| Cycle Life | 300 | 800 |
| Peak Current | 15A | 680A (80C) |
Are special chargers required for lithium replacements?
Yes—LiPo balance chargers are mandatory. Original 8V lead-acid chargers use unregulated 9V outputs that would overcharge lithium cells. The SkyRC T200 charger supports 2S configurations with cell-balancing, stopping at 8.4V±0.05V. Pro Tip: Set storage charge to 7.6V if batteries won’t be used for >72 hours.
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What capacity upgrades are available?
Modern lithium packs offer 5200-8500mAh capacities vs original 1800-2200mAh lead-acid units. The BT 8500mAh model triples runtime—from 45 minutes to 2.5 hours in RC trucks. However, higher capacities increase physical size: 8500mAh packs are 25% longer than 5200mAh equivalents.
| Capacity | Runtime @10A | Weight |
|---|---|---|
| 2200mAh (Pb) | 13min | 2.1kg |
| 5200mAh (LiPo) | 31min | 0.7kg |
| 8500mAh (LiPo) | 51min | 1.1kg |
Redway Battery Expert Insight
FAQs
Only in 2S configurations—single 18650 cells provide 3.7V nominal (4.2V charged), insufficient for 8V systems. Two in series create 7.4V nominal (8.4V charged) systems compatible with original electronics.
How to maintain lithium replacements?
Store at 40-60% charge (7.6-7.8V) when inactive. Perform full balance charging every 90 days—prolonged storage below 6V permanently damages LiPo cells.
